Question

Use cross products to demonstrate whether or not the two ratios are equivalent 4/6 and 14/21

Answer 1

What you do here is you set up an equation like this:
$\frac{4}{6} = \frac{14}{21}$
Cross multiply;
$4*21 = 6*14 \\ 84 = 84$
Sine they are equal, the two ratios are equivalent.

Answer 2

the two ratios are equivalent beacuse 4/6 is not like a positive number so 4/6 and 14/21 are equivalent