Which pair of ratios are proportional? 6/21 and 2/7, 1/5 and 3/15, 19/45 and 6/15, or 3/4 and 9/14
The pair of ratios that are proportional are 19/45 and 6/15.
To check if two ratios are proportional, you can cross multiply and see if the products are equal.
For 19/45 and 6/15:
19 * 15 = 285
6 * 45 = 270
Since 285 = 270, the ratios are proportional.