Which pair of ratios forms a proportion?
A) $\frac { 70 } { 60 } , \frac { 28 } { 18 }$
B) $\frac { 14 } { 18 } , \frac { 28 } { 24 }$
C) $\frac { 70 } { 60 } , \frac { 21 } { 18 }$
D) $\frac { 15 } { 17 } , \frac { 3 } { 5 }$
E) $\frac { 3 } { 4 } , \frac { 4 } { 3 }$

Question

Quizplus · Accepted Answer

Two ratios form a proportion if their cross products are equal. For choice C, $\frac { 70 } { 60 } = \frac { 21 } { 18 }$, simplifying both gives $\frac { 7 } { 6 }$, showing they are equivalent and form a proportion.

Which Pair of Ratios Forms a Proportion? A) 7060,2818\frac { 70 } { 60 } , \frac { 28 } { 18 }6070​,1828​

Which Pair of Ratios Forms a Proportion?
A) $\frac { 70 } { 60 } , \frac { 28 } { 18 }$