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Finding the Fourth Proportional to 8,387.88, 12,581.85 and 3,124.05

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Solution

The fourth proportional to 8,387.88, 12,581.85 and 3,124.05 is: 4,686.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.88 : 12,581.85 = 3,124.05 : x
  2. Step 2: Convert to fraction form
    8,387.88/12,581.85 = 3,124.05/x
  3. Step 3: Cross multiply
    8,387.88x = 12,581.85 × 3,124.05
  4. Step 4: Simplify right side
    8,387.88x = 39,306,328.49
  5. Step 5: Solve for x
    x = 39,306,328.49/8,387.88
  6. Step 6: Final answer
    x = 4,686.09

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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.