Question

The ratio of girls to boys is 3 to 4. If there are 48 boys, how many girls are there?

Answer 1

48/4 = 12

12 * 4 = 48

12 * 3 = 36

There are 36 girls.

Answer 2

ANSWER:  

There are 36 girls in a class when there are 48 boys

SOLUTION:

Given, ratio of number of girls to number of boys is 3 to 4.

Ratio proportion for above condition is given as

Number of girls : Number of boys : : 3 : 4

Ratio proportion can also be written as $\frac{\text {no.of girls}}{\text {no. of boys}}=\frac{3}{4}$   --- eqn 1

Now, given that, find how many girls, when there are 48 boys in the class.

From eqn 1 we have  

$\frac{number of \text { girls }}{no. o f \text { boys }}=\frac{3}{4}$

$\frac{number \text { of girls }}{48}=\frac{3}{4}$

$No. of girls = \frac{3}{4} \times 48$

$No. of girls = 3 \times 12$

No. of girls = 36.

Hence, there are 36 girls in a class when there are 48 boys