Question

Determine if the following numbers are in proportion or not:

(2) 4, 6, 8, 12

Answer 1

Consider the ratio of 4 and 6.
$4:6=\frac{4}{6}=\frac{4÷2}{6÷2}=\frac{2}{3}$

Now, consider the ratio of 8 and 12.
$8:12=\frac{8}{12}=\frac{8÷4}{12÷4}=\frac{2}{3}$

The two ratios are equal.
If two ratios are equal, then the values or numbers are said to be in proportion. Therefore, the numbers 4, 6, 8 and 12 are in proportion.