Question

Find the missing number in the box
in the proportions:

`3/8 = square/20`

Answer 1

In order to get the missing number, we consider the fact that 4 × 5 = 20, i.e., we get 20 when we multiply 5 by 4. This indicates that to get the missing number, 3 must also be multiplied by 4.

When we multiply, we have, 3 × 4 = 12

Hence, the ratio is `12/20`.

∴ \[\frac{3}{8} = \frac{\boxed{12}}{20}\]