Question

Which is the missing value in the proportion 4/5=x/30

Answer 1

x=24

Explanation:

By cross multiplying
`(4)/(5)` and
`(x)/(30)` we get

5x=30*4

5x=120

x=120/5

x=24 (which makes sense because in order to get a denominator of 30 from 5 you need to multiply it by 6, and then the numerator would also be multiplied by 6 (4*6=24) )