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Finding the Fourth Proportional to 40,407.91, 60,545.03 and 20,659.30

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Solution

The fourth proportional to 40,407.91, 60,545.03 and 20,659.30 is: 30,954.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,407.91 : 60,545.03 = 20,659.30 : x
  2. Step 2: Convert to fraction form
    40,407.91/60,545.03 = 20,659.30/x
  3. Step 3: Cross multiply
    40,407.91x = 60,545.03 × 20,659.30
  4. Step 4: Simplify right side
    40,407.91x = 1,250,817,938.28
  5. Step 5: Solve for x
    x = 1,250,817,938.28/40,407.91
  6. Step 6: Final answer
    x = 30,954.78

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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.