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Finding the Fourth Proportional to 18,132.40, 27,147.40 and 17,620.40

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Solution

The fourth proportional to 18,132.40, 27,147.40 and 17,620.40 is: 26,380.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,132.40 : 27,147.40 = 17,620.40 : x
  2. Step 2: Convert to fraction form
    18,132.40/27,147.40 = 17,620.40/x
  3. Step 3: Cross multiply
    18,132.40x = 27,147.40 × 17,620.40
  4. Step 4: Simplify right side
    18,132.40x = 478,348,046.96
  5. Step 5: Solve for x
    x = 478,348,046.96/18,132.40
  6. Step 6: Final answer
    x = 26,380.85

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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.