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Finding the Fourth Proportional to 12,229.80, 18,344.70 and 12,114.60

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Solution

The fourth proportional to 12,229.80, 18,344.70 and 12,114.60 is: 18,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.80 : 18,344.70 = 12,114.60 : x
  2. Step 2: Convert to fraction form
    12,229.80/18,344.70 = 12,114.60/x
  3. Step 3: Cross multiply
    12,229.80x = 18,344.70 × 12,114.60
  4. Step 4: Simplify right side
    12,229.80x = 222,238,702.62
  5. Step 5: Solve for x
    x = 222,238,702.62/12,229.80
  6. Step 6: Final answer
    x = 18,171.90

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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.