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Finding the Fourth Proportional to 40,405.91, 60,542.03 and 20,657.30

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Solution

The fourth proportional to 40,405.91, 60,542.03 and 20,657.30 is: 30,951.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,405.91 : 60,542.03 = 20,657.30 : x
  2. Step 2: Convert to fraction form
    40,405.91/60,542.03 = 20,657.30/x
  3. Step 3: Cross multiply
    40,405.91x = 60,542.03 × 20,657.30
  4. Step 4: Simplify right side
    40,405.91x = 1,250,634,625.25
  5. Step 5: Solve for x
    x = 1,250,634,625.25/40,405.91
  6. Step 6: Final answer
    x = 30,951.78

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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.