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Finding the Fourth Proportional to 8,154.38, 12,231.57 and 7,738.85

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Solution

The fourth proportional to 8,154.38, 12,231.57 and 7,738.85 is: 11,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,154.38 : 12,231.57 = 7,738.85 : x
  2. Step 2: Convert to fraction form
    8,154.38/12,231.57 = 7,738.85/x
  3. Step 3: Cross multiply
    8,154.38x = 12,231.57 × 7,738.85
  4. Step 4: Simplify right side
    8,154.38x = 94,658,285.49
  5. Step 5: Solve for x
    x = 94,658,285.49/8,154.38
  6. Step 6: Final answer
    x = 11,608.28

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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.