what denominator for 21/3 = 49/? would make these ratios proportional?
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.