Home / 20,520.47-28,330.46-13,459.20

Finding the Fourth Proportional to 20,520.47, 28,330.46 and 13,459.20

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Solution

The fourth proportional to 20,520.47, 28,330.46 and 13,459.20 is: 18,581.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.47 : 28,330.46 = 13,459.20 : x
  2. Step 2: Convert to fraction form
    20,520.47/28,330.46 = 13,459.20/x
  3. Step 3: Cross multiply
    20,520.47x = 28,330.46 × 13,459.20
  4. Step 4: Simplify right side
    20,520.47x = 381,305,204.17
  5. Step 5: Solve for x
    x = 381,305,204.17/20,520.47
  6. Step 6: Final answer
    x = 18,581.70

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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.