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Finding the Fourth Proportional to 8,520.87, 12,762.84 and 4,129.14

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Solution

The fourth proportional to 8,520.87, 12,762.84 and 4,129.14 is: 6,184.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.87 : 12,762.84 = 4,129.14 : x
  2. Step 2: Convert to fraction form
    8,520.87/12,762.84 = 4,129.14/x
  3. Step 3: Cross multiply
    8,520.87x = 12,762.84 × 4,129.14
  4. Step 4: Simplify right side
    8,520.87x = 52,699,553.16
  5. Step 5: Solve for x
    x = 52,699,553.16/8,520.87
  6. Step 6: Final answer
    x = 6,184.76

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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.