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Finding the Fourth Proportional to 18,115.70, 27,173.87 and 6,422.90

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Solution

The fourth proportional to 18,115.70, 27,173.87 and 6,422.90 is: 9,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.70 : 27,173.87 = 6,422.90 : x
  2. Step 2: Convert to fraction form
    18,115.70/27,173.87 = 6,422.90/x
  3. Step 3: Cross multiply
    18,115.70x = 27,173.87 × 6,422.90
  4. Step 4: Simplify right side
    18,115.70x = 174,535,049.62
  5. Step 5: Solve for x
    x = 174,535,049.62/18,115.70
  6. Step 6: Final answer
    x = 9,634.46

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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.