Final answer:
To find the missing number that makes the fractions equal, set up a proportion and cross multiply to solve for the missing number. The missing number in this case is 16.
Step-by-step explanation:
To find the missing number that makes the fractions equal, we can set up a proportion. Since the numerator of the first fraction is 4 and the denominator is unknown, we can write the proportion as:
4/? = 2/8
To solve for the missing number, we cross multiply:
4 * 8 = ? * 2
32 = ? * 2
Divide both sides of the equation by 2: ? = 16
Therefore, the missing number that makes the fractions equal is 16.