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Finding the Fourth Proportional to 16,899.20, 25,351.68 and 8,578.88

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Solution

The fourth proportional to 16,899.20, 25,351.68 and 8,578.88 is: 12,869.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,899.20 : 25,351.68 = 8,578.88 : x
  2. Step 2: Convert to fraction form
    16,899.20/25,351.68 = 8,578.88/x
  3. Step 3: Cross multiply
    16,899.20x = 25,351.68 × 8,578.88
  4. Step 4: Simplify right side
    16,899.20x = 217,489,020.52
  5. Step 5: Solve for x
    x = 217,489,020.52/16,899.20
  6. Step 6: Final answer
    x = 12,869.78

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1.5x scale

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.