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Finding the Fourth Proportional to 18,003.20, 27,004.80 and 15,540.80

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Solution

The fourth proportional to 18,003.20, 27,004.80 and 15,540.80 is: 23,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,003.20 : 27,004.80 = 15,540.80 : x
  2. Step 2: Convert to fraction form
    18,003.20/27,004.80 = 15,540.80/x
  3. Step 3: Cross multiply
    18,003.20x = 27,004.80 × 15,540.80
  4. Step 4: Simplify right side
    18,003.20x = 419,676,195.84
  5. Step 5: Solve for x
    x = 419,676,195.84/18,003.20
  6. Step 6: Final answer
    x = 23,311.20

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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.