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Finding the Fourth Proportional to 17,140.80, 25,711.20 and 11,235.90

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Solution

The fourth proportional to 17,140.80, 25,711.20 and 11,235.90 is: 16,853.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,140.80 : 25,711.20 = 11,235.90 : x
  2. Step 2: Convert to fraction form
    17,140.80/25,711.20 = 11,235.90/x
  3. Step 3: Cross multiply
    17,140.80x = 25,711.20 × 11,235.90
  4. Step 4: Simplify right side
    17,140.80x = 288,888,472.08
  5. Step 5: Solve for x
    x = 288,888,472.08/17,140.80
  6. Step 6: Final answer
    x = 16,853.85

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Similar ratio
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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.