Question

The same number goes into each box to make the two ratios below equivalent.

4 0
36
Which number goes into both boxes?
6
09
12
18
27

Answer 1

12

Explanation:

4 / 12 = 12 / 36 so answer : 12

That was just by looking.....here is mathematical way :

4/ x = x/36 cross multiply

144 = x^2

x = 12