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Finding the Fourth Proportional to 29,593.92, 40,790.85 and 20,982.90

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Solution

The fourth proportional to 29,593.92, 40,790.85 and 20,982.90 is: 28,921.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,593.92 : 40,790.85 = 20,982.90 : x
  2. Step 2: Convert to fraction form
    29,593.92/40,790.85 = 20,982.90/x
  3. Step 3: Cross multiply
    29,593.92x = 40,790.85 × 20,982.90
  4. Step 4: Simplify right side
    29,593.92x = 855,910,326.47
  5. Step 5: Solve for x
    x = 855,910,326.47/29,593.92
  6. Step 6: Final answer
    x = 28,921.83

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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.