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Finding the Fourth Proportional to 8,359.76, 12,531.18 and 5,241.96

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Solution

The fourth proportional to 8,359.76, 12,531.18 and 5,241.96 is: 7,857.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,359.76 : 12,531.18 = 5,241.96 : x
  2. Step 2: Convert to fraction form
    8,359.76/12,531.18 = 5,241.96/x
  3. Step 3: Cross multiply
    8,359.76x = 12,531.18 × 5,241.96
  4. Step 4: Simplify right side
    8,359.76x = 65,687,944.31
  5. Step 5: Solve for x
    x = 65,687,944.31/8,359.76
  6. Step 6: Final answer
    x = 7,857.64

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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.