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Finding the Fourth Proportional to 7,149.70, 10,724.55 and 5,910.40

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Solution

The fourth proportional to 7,149.70, 10,724.55 and 5,910.40 is: 8,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.70 : 10,724.55 = 5,910.40 : x
  2. Step 2: Convert to fraction form
    7,149.70/10,724.55 = 5,910.40/x
  3. Step 3: Cross multiply
    7,149.70x = 10,724.55 × 5,910.40
  4. Step 4: Simplify right side
    7,149.70x = 63,386,380.32
  5. Step 5: Solve for x
    x = 63,386,380.32/7,149.70
  6. Step 6: Final answer
    x = 8,865.60

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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.