7 | |
30 |
= |
r |
720 |
If 2 proportions are equal:
we can cross multiply to get:
Numerator 1 Denominator 1
=
Numerator 2 Denominator 2 Numerator 1 * Denominator 2 = Denominator 1 * Numerator 2
Numerator 2 = | Numerator 1 * Denominator 2 |
Denominator 1 |
r = | 7 * 720 |
30 |
r = | 5040 |
30 |