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Finding the Fourth Proportional to 8,620.43, 12,928.14 and 3,937.96

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Solution

The fourth proportional to 8,620.43, 12,928.14 and 3,937.96 is: 5,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.43 : 12,928.14 = 3,937.96 : x
  2. Step 2: Convert to fraction form
    8,620.43/12,928.14 = 3,937.96/x
  3. Step 3: Cross multiply
    8,620.43x = 12,928.14 × 3,937.96
  4. Step 4: Simplify right side
    8,620.43x = 50,910,433.55
  5. Step 5: Solve for x
    x = 50,910,433.55/8,620.43
  6. Step 6: Final answer
    x = 5,905.79

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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.