Question

Sonny substituded 5 for x in the proportion 16/x =48/15 and cross to multiply to get 240 =240 why is this?

Answer 1

If x = 5 then 5*48 = 240 and 16*15 equals 240 equals eachother.

Another perspective: Divide 16 by 5 then divide 48/15

16/5=3.2 48/15=3.2 Hence the porportions are the same.