Home / 13,812.80-20,719.20-12,603.20

Finding the Fourth Proportional to 13,812.80, 20,719.20 and 12,603.20

Calculator

Solution

The fourth proportional to 13,812.80, 20,719.20 and 12,603.20 is: 18,904.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.80 : 20,719.20 = 12,603.20 : x
  2. Step 2: Convert to fraction form
    13,812.80/20,719.20 = 12,603.20/x
  3. Step 3: Cross multiply
    13,812.80x = 20,719.20 × 12,603.20
  4. Step 4: Simplify right side
    13,812.80x = 261,128,221.44
  5. Step 5: Solve for x
    x = 261,128,221.44/13,812.80
  6. Step 6: Final answer
    x = 18,904.80

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.