Question

How do you find the cross products to determine whether the following proportions are true or false ?
1.) 2/3=20/27
2.) 110/18=16/3

Answer 1

You use the Means-Extremes property.

a/b = c/d IF a*d = b*c

Answer 2

1.) 2/3=20/27

Does 2*27 = 3*20?

If so, the proportion is correct.
If not, the proportion is false.

Answer 3

Oh thank you !

Answer 4

Means-Extremes Property and Cross Products Property are the same.