Let x and y be the lengths of the segments. From the given above, the ratio of the sides is equal to 2/3.
x / y = 2 / 3
From the proportion, it is conclusive that x = 2y/3. The sum of x and y should be equal to 12.
x + y = 12
(2x/3 + y) = 12
The value of y is 7.2. The value of x then is equal to 4 4/5. The answer is the third choice.