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Finding the Fourth Proportional to 12,491.55, 18,735.17 and 4,700.43

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Solution

The fourth proportional to 12,491.55, 18,735.17 and 4,700.43 is: 7,049.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.55 : 18,735.17 = 4,700.43 : x
  2. Step 2: Convert to fraction form
    12,491.55/18,735.17 = 4,700.43/x
  3. Step 3: Cross multiply
    12,491.55x = 18,735.17 × 4,700.43
  4. Step 4: Simplify right side
    12,491.55x = 88,063,331.62
  5. Step 5: Solve for x
    x = 88,063,331.62/12,491.55
  6. Step 6: Final answer
    x = 7,049.83

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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.