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Finding the Fourth Proportional to 18,105.80, 27,158.70 and 12,230.60

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Solution

The fourth proportional to 18,105.80, 27,158.70 and 12,230.60 is: 18,345.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.80 : 27,158.70 = 12,230.60 : x
  2. Step 2: Convert to fraction form
    18,105.80/27,158.70 = 12,230.60/x
  3. Step 3: Cross multiply
    18,105.80x = 27,158.70 × 12,230.60
  4. Step 4: Simplify right side
    18,105.80x = 332,167,196.22
  5. Step 5: Solve for x
    x = 332,167,196.22/18,105.80
  6. Step 6: Final answer
    x = 18,345.90

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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.