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Finding the Fourth Proportional to 40,398.89, 60,600.66 and 12,319.90

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Solution

The fourth proportional to 40,398.89, 60,600.66 and 12,319.90 is: 18,480.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,398.89 : 60,600.66 = 12,319.90 : x
  2. Step 2: Convert to fraction form
    40,398.89/60,600.66 = 12,319.90/x
  3. Step 3: Cross multiply
    40,398.89x = 60,600.66 × 12,319.90
  4. Step 4: Simplify right side
    40,398.89x = 746,593,873.43
  5. Step 5: Solve for x
    x = 746,593,873.43/40,398.89
  6. Step 6: Final answer
    x = 18,480.56

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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.