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Finding the Fourth Proportional to 7,229.80, 10,844.70 and 5,115.70

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Solution

The fourth proportional to 7,229.80, 10,844.70 and 5,115.70 is: 7,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,229.80 : 10,844.70 = 5,115.70 : x
  2. Step 2: Convert to fraction form
    7,229.80/10,844.70 = 5,115.70/x
  3. Step 3: Cross multiply
    7,229.80x = 10,844.70 × 5,115.70
  4. Step 4: Simplify right side
    7,229.80x = 55,478,231.79
  5. Step 5: Solve for x
    x = 55,478,231.79/7,229.80
  6. Step 6: Final answer
    x = 7,673.55

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Half scale
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Double scale
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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.