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Finding the Fourth Proportional to 14,002.65, 20,997.90 and 5,679.90

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Solution

The fourth proportional to 14,002.65, 20,997.90 and 5,679.90 is: 8,517.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,002.65 : 20,997.90 = 5,679.90 : x
  2. Step 2: Convert to fraction form
    14,002.65/20,997.90 = 5,679.90/x
  3. Step 3: Cross multiply
    14,002.65x = 20,997.90 × 5,679.90
  4. Step 4: Simplify right side
    14,002.65x = 119,265,972.21
  5. Step 5: Solve for x
    x = 119,265,972.21/14,002.65
  6. Step 6: Final answer
    x = 8,517.39

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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.