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Finding the Fourth Proportional to 12,299.64, 18,449.46 and 8,138.85

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Solution

The fourth proportional to 12,299.64, 18,449.46 and 8,138.85 is: 12,208.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,299.64 : 18,449.46 = 8,138.85 : x
  2. Step 2: Convert to fraction form
    12,299.64/18,449.46 = 8,138.85/x
  3. Step 3: Cross multiply
    12,299.64x = 18,449.46 × 8,138.85
  4. Step 4: Simplify right side
    12,299.64x = 150,157,387.52
  5. Step 5: Solve for x
    x = 150,157,387.52/12,299.64
  6. Step 6: Final answer
    x = 12,208.28

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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.