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Finding the Fourth Proportional to 8,400.92, 12,604.62 and 3,135.92

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Solution

The fourth proportional to 8,400.92, 12,604.62 and 3,135.92 is: 4,705.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,400.92 : 12,604.62 = 3,135.92 : x
  2. Step 2: Convert to fraction form
    8,400.92/12,604.62 = 3,135.92/x
  3. Step 3: Cross multiply
    8,400.92x = 12,604.62 × 3,135.92
  4. Step 4: Simplify right side
    8,400.92x = 39,527,079.95
  5. Step 5: Solve for x
    x = 39,527,079.95/8,400.92
  6. Step 6: Final answer
    x = 4,705.09

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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.