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10.2: Proporciones
https://espanol.libretexts.org/Matematicas/Aritmetica_y_Matematicas_Basicas/HiSet_Matematicas/10%3A_Ratios_y_Tarifas/10.02%3A_Proporciones
\(\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4}... $\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4} = \dfrac{x}{16}} & {\text{ means that } 5 \cdot 16 = 4 \cdot x} \\ {\dfrac{5}{4} = \dfrac{20}{x}} & {\text{ means that } 5 \cdot x = 4 \cdot 20} \end{array}$ 18 gramos de cobalto es a 10 gramos de plata ya que 36 gramos de cobalto es a 20 gramos de plata.
10.2: Proporciones
https://espanol.libretexts.org/Matematicas/Aritmetica_y_Matematicas_Basicas/HiSet_Mathematicas_Saul_Lopez/10%3A_Ratios_y_Tarifas/10.02%3A_Proporciones
\(\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4}... $\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4} = \dfrac{x}{16}} & {\text{ means that } 5 \cdot 16 = 4 \cdot x} \\ {\dfrac{5}{4} = \dfrac{20}{x}} & {\text{ means that } 5 \cdot x = 4 \cdot 20} \end{array}$ 18 gramos de cobalto es a 10 gramos de plata ya que 36 gramos de cobalto es a 20 gramos de plata.
7.2: Proporciones
https://espanol.libretexts.org/Matematicas/Pre-Algebra/Libro%3A_Fundamentos_de_Matematicas_(Burzynski_y_Ellis)/07%3A_Ratios_y_Tarifas/7.02%3A_Proporciones
\(\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4}... $\begin{array} {ll} {\dfrac{x}{4} = \dfrac{20}{16}} & {\text{ means that } 16 \cdot x = 4 \cdot 20} \\ {\dfrac{4}{x} = \dfrac{16}{20}} & {\text{ means that } 4 \cdot 20 = 16 \cdot x} \\ {\dfrac{5}{4} = \dfrac{x}{16}} & {\text{ means that } 5 \cdot 16 = 4 \cdot x} \\ {\dfrac{5}{4} = \dfrac{20}{x}} & {\text{ means that } 5 \cdot x = 4 \cdot 20} \end{array}$ 18 gramos de cobalto es a 10 gramos de plata ya que 36 gramos de cobalto es a 20 gramos de plata.

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