Final answer:
The perimeter of the quadrilateral is 20 inches.
Step-by-step explanation:
To find the perimeter of a quadrilateral, you need to add together the lengths of all four sides. In this case, the side lengths are 4 inches, 5 inches, 3 inches, and 8 inches. Add them together: 4 + 5 + 3 + 8 = 20 inches. So, the perimeter of the quadrilateral is 20 inches.