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Finding the Fourth Proportional to 18,087.59, 27,101.13 and 11,839.79

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Solution

The fourth proportional to 18,087.59, 27,101.13 and 11,839.79 is: 17,739.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,087.59 : 27,101.13 = 11,839.79 : x
  2. Step 2: Convert to fraction form
    18,087.59/27,101.13 = 11,839.79/x
  3. Step 3: Cross multiply
    18,087.59x = 27,101.13 × 11,839.79
  4. Step 4: Simplify right side
    18,087.59x = 320,871,687.96
  5. Step 5: Solve for x
    x = 320,871,687.96/18,087.59
  6. Step 6: Final answer
    x = 17,739.88

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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.