Which equation could you use to solve for x in the proportion 4/5=9/x 20

Need plz been trying to do it for a long time and still haven’t succeeded

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i