In order for the ratios to be proportional, the denominators on both sides of the equation must be equal.
Given that the original ratio is 21/3 = 49/?, to find the missing denominator that would make the ratios proportional, we need to cross-multiply:
21 * ? = 3 * 49
? = (3 * 49) / 21
To simplify the expression, we can divide both 3 and 49 by their greatest common divisor, which is 1.
? = (3/21) * 49
? = (1/7) * 49
? = 7
Therefore, a denominator of 7 on the right side would make the ratios proportional.
what denominator for 21/3 = 49/? would make these ratios proportional?
1 answer