Question

vocabulary review from last week. remember last week we talked about proportions which you also should have done as your most recent assignment. which of the following is not a correct proportion? 1. $\frac{1}{6}=\frac{3}{18}$ 2. $\frac{10}{15}=\frac{2}{3}$ 3. $\frac{1}{8}=\frac{1}{4}$ 4. $\frac{1}{12}=\frac{1}{4}$

Explanation:

Step1: Comprobar proporciones

Para una proporción $\frac{a}{b}=\frac{c}{d}$, se debe cumplir que $a\times d = b\times c$.

Para $\frac{1}{6}=\frac{3}{18}$

$1\times18 = 6\times3$, $18 = 18$, es una proporción correcta.

Para $\frac{10}{15}=\frac{2}{3}$

$10\times3=15\times 2$, $30 = 30$, es una proporción correcta.

Para $\frac{2}{10}=\frac{1}{5}$

$2\times5 = 10\times1$, $10 = 10$, es una proporción correcta.

Para $\frac{1}{8}=\frac{1}{4}$

$1\times4
eq8\times1$, $4
eq8$, no es una proporción correcta.

Answer:

$\frac{1}{8}=\frac{1}{4}$ no es una proporción correcta.