In order to find the ratios that are equivalent to 4 to 7, you multiply the numerator and denominator by the same number. In this case, just see if it makes sense.
Answers: 8:14 because you multiply 4 and 7 by 2 to get an equal ration of 8:14 16/28 because you multiply 4 and 7 by 4 to get 16/28