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Finding the Fourth Proportional to 16,819.90, 25,230.42 and 8,911.71

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Solution

The fourth proportional to 16,819.90, 25,230.42 and 8,911.71 is: 13,367.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,819.90 : 25,230.42 = 8,911.71 : x
  2. Step 2: Convert to fraction form
    16,819.90/25,230.42 = 8,911.71/x
  3. Step 3: Cross multiply
    16,819.90x = 25,230.42 × 8,911.71
  4. Step 4: Simplify right side
    16,819.90x = 224,846,141.66
  5. Step 5: Solve for x
    x = 224,846,141.66/16,819.90
  6. Step 6: Final answer
    x = 13,367.87

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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.