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Finding the Fourth Proportional to 18,474.68, 27,721.25 and 7,389.33

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Solution

The fourth proportional to 18,474.68, 27,721.25 and 7,389.33 is: 11,087.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.68 : 27,721.25 = 7,389.33 : x
  2. Step 2: Convert to fraction form
    18,474.68/27,721.25 = 7,389.33/x
  3. Step 3: Cross multiply
    18,474.68x = 27,721.25 × 7,389.33
  4. Step 4: Simplify right side
    18,474.68x = 204,841,361.46
  5. Step 5: Solve for x
    x = 204,841,361.46/18,474.68
  6. Step 6: Final answer
    x = 11,087.68

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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.