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Finding the Fourth Proportional to 18,165.20, 27,231.60 and 10,761.80

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Solution

The fourth proportional to 18,165.20, 27,231.60 and 10,761.80 is: 16,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,165.20 : 27,231.60 = 10,761.80 : x
  2. Step 2: Convert to fraction form
    18,165.20/27,231.60 = 10,761.80/x
  3. Step 3: Cross multiply
    18,165.20x = 27,231.60 × 10,761.80
  4. Step 4: Simplify right side
    18,165.20x = 293,061,032.88
  5. Step 5: Solve for x
    x = 293,061,032.88/18,165.20
  6. Step 6: Final answer
    x = 16,133.10

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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.