Home / 14,613.28-20,163.60-8,640.16

Finding the Fourth Proportional to 14,613.28, 20,163.60 and 8,640.16

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Solution

The fourth proportional to 14,613.28, 20,163.60 and 8,640.16 is: 11,921.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,613.28 : 20,163.60 = 8,640.16 : x
  2. Step 2: Convert to fraction form
    14,613.28/20,163.60 = 8,640.16/x
  3. Step 3: Cross multiply
    14,613.28x = 20,163.60 × 8,640.16
  4. Step 4: Simplify right side
    14,613.28x = 174,216,730.18
  5. Step 5: Solve for x
    x = 174,216,730.18/14,613.28
  6. Step 6: Final answer
    x = 11,921.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.