Question 608578
5L = 69120 * L^4/ 13824^2 
multiplying both sides by 13824^2:
5L*13824^2 = 69120 * L^4 
dividing both sides by 5:
L*13824^2 = 13824 * L^4 
dividing both sides by L:
13824^2 = 13824 * L^3
dividing both sides by 13824:
13824 = L^3
take the cube root of both sides:
24 = L