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Finding the Fourth Proportional to 40,606.30, 60,916.02 and 12,519.78

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Solution

The fourth proportional to 40,606.30, 60,916.02 and 12,519.78 is: 18,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,606.30 : 60,916.02 = 12,519.78 : x
  2. Step 2: Convert to fraction form
    40,606.30/60,916.02 = 12,519.78/x
  3. Step 3: Cross multiply
    40,606.30x = 60,916.02 × 12,519.78
  4. Step 4: Simplify right side
    40,606.30x = 762,655,168.88
  5. Step 5: Solve for x
    x = 762,655,168.88/40,606.30
  6. Step 6: Final answer
    x = 18,781.70

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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.