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Finding the Fourth Proportional to 8,318.85, 12,478.28 and 8,232.45

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Solution

The fourth proportional to 8,318.85, 12,478.28 and 8,232.45 is: 12,348.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.85 : 12,478.28 = 8,232.45 : x
  2. Step 2: Convert to fraction form
    8,318.85/12,478.28 = 8,232.45/x
  3. Step 3: Cross multiply
    8,318.85x = 12,478.28 × 8,232.45
  4. Step 4: Simplify right side
    8,318.85x = 102,726,775.02
  5. Step 5: Solve for x
    x = 102,726,775.02/8,318.85
  6. Step 6: Final answer
    x = 12,348.68

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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.