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Finding the Fourth Proportional to 16,897.80, 25,353.90 and 8,128.20

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Solution

The fourth proportional to 16,897.80, 25,353.90 and 8,128.20 is: 12,195.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,897.80 : 25,353.90 = 8,128.20 : x
  2. Step 2: Convert to fraction form
    16,897.80/25,353.90 = 8,128.20/x
  3. Step 3: Cross multiply
    16,897.80x = 25,353.90 × 8,128.20
  4. Step 4: Simplify right side
    16,897.80x = 206,081,569.98
  5. Step 5: Solve for x
    x = 206,081,569.98/16,897.80
  6. Step 6: Final answer
    x = 12,195.76

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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.