Question

Is the ratio 4.2:1.5 proportional to the ratio12.6:4.5? Explain.

Answer 1

Yes, the ratio is proportional

Explanation:

given 4.2 : 1.5 =? 12.6 : 4.5 is it proportional

it must follow the means extremes property

`(a)/(b)` =
`(c)/(d)`

a*d = b*c, so let's plug in the values

`(4.2)/(1.5)` =?
`(12.4)/(4.5)`

(4.2)*(4.5) =? (1.5)*(12.6)

18.9 = 18.9 which is true; therefore the ratio is proportional

Answer 2

No

Explanation:

All the numbers have to be multiplied by the same amount for it to be proportional

A proportional amount to 4:2:1:5 would be 12:6:3:15

They have all been multiplied by the same number 3