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Finding the Fourth Proportional to 40,443.90, 60,655.05 and 12,363.90

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Solution

The fourth proportional to 40,443.90, 60,655.05 and 12,363.90 is: 18,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,443.90 : 60,655.05 = 12,363.90 : x
  2. Step 2: Convert to fraction form
    40,443.90/60,655.05 = 12,363.90/x
  3. Step 3: Cross multiply
    40,443.90x = 60,655.05 × 12,363.90
  4. Step 4: Simplify right side
    40,443.90x = 749,932,972.70
  5. Step 5: Solve for x
    x = 749,932,972.70/40,443.90
  6. Step 6: Final answer
    x = 18,542.55

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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.