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Finding the Fourth Proportional to 8,356.75, 12,531.03 and 3,425.05

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Solution

The fourth proportional to 8,356.75, 12,531.03 and 3,425.05 is: 5,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,356.75 : 12,531.03 = 3,425.05 : x
  2. Step 2: Convert to fraction form
    8,356.75/12,531.03 = 3,425.05/x
  3. Step 3: Cross multiply
    8,356.75x = 12,531.03 × 3,425.05
  4. Step 4: Simplify right side
    8,356.75x = 42,919,404.30
  5. Step 5: Solve for x
    x = 42,919,404.30/8,356.75
  6. Step 6: Final answer
    x = 5,135.90

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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.