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Finding the Fourth Proportional to 7,171.70, 10,757.55 and 5,422.10

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Solution

The fourth proportional to 7,171.70, 10,757.55 and 5,422.10 is: 8,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171.70 : 10,757.55 = 5,422.10 : x
  2. Step 2: Convert to fraction form
    7,171.70/10,757.55 = 5,422.10/x
  3. Step 3: Cross multiply
    7,171.70x = 10,757.55 × 5,422.10
  4. Step 4: Simplify right side
    7,171.70x = 58,328,511.86
  5. Step 5: Solve for x
    x = 58,328,511.86/7,171.70
  6. Step 6: Final answer
    x = 8,133.15

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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.