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Finding the Fourth Proportional to 17,140.70, 25,711.05 and 8,392.70

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Solution

The fourth proportional to 17,140.70, 25,711.05 and 8,392.70 is: 12,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,140.70 : 25,711.05 = 8,392.70 : x
  2. Step 2: Convert to fraction form
    17,140.70/25,711.05 = 8,392.70/x
  3. Step 3: Cross multiply
    17,140.70x = 25,711.05 × 8,392.70
  4. Step 4: Simplify right side
    17,140.70x = 215,785,129.34
  5. Step 5: Solve for x
    x = 215,785,129.34/17,140.70
  6. Step 6: Final answer
    x = 12,589.05

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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.