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Finding the Fourth Proportional to 36,476.78, 54,721.65 and 12,459.78

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Solution

The fourth proportional to 36,476.78, 54,721.65 and 12,459.78 is: 18,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,476.78 : 54,721.65 = 12,459.78 : x
  2. Step 2: Convert to fraction form
    36,476.78/54,721.65 = 12,459.78/x
  3. Step 3: Cross multiply
    36,476.78x = 54,721.65 × 12,459.78
  4. Step 4: Simplify right side
    36,476.78x = 681,819,720.24
  5. Step 5: Solve for x
    x = 681,819,720.24/36,476.78
  6. Step 6: Final answer
    x = 18,691.88

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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.