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Finding the Fourth Proportional to 8,581.87, 12,872.94 and 3,319.30

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Solution

The fourth proportional to 8,581.87, 12,872.94 and 3,319.30 is: 4,979.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.87 : 12,872.94 = 3,319.30 : x
  2. Step 2: Convert to fraction form
    8,581.87/12,872.94 = 3,319.30/x
  3. Step 3: Cross multiply
    8,581.87x = 12,872.94 × 3,319.30
  4. Step 4: Simplify right side
    8,581.87x = 42,729,149.74
  5. Step 5: Solve for x
    x = 42,729,149.74/8,581.87
  6. Step 6: Final answer
    x = 4,979.00

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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.