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Finding the Fourth Proportional to 8,620.47, 11,892.17 and 7,374.90

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Solution

The fourth proportional to 8,620.47, 11,892.17 and 7,374.90 is: 10,173.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.47 : 11,892.17 = 7,374.90 : x
  2. Step 2: Convert to fraction form
    8,620.47/11,892.17 = 7,374.90/x
  3. Step 3: Cross multiply
    8,620.47x = 11,892.17 × 7,374.90
  4. Step 4: Simplify right side
    8,620.47x = 87,703,564.53
  5. Step 5: Solve for x
    x = 87,703,564.53/8,620.47
  6. Step 6: Final answer
    x = 10,173.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.