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Finding the Fourth Proportional to 18,081.68, 24,940.16 and 15,386

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Solution

The fourth proportional to 18,081.68, 24,940.16 and 15,386 is: 21,221.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,081.68 : 24,940.16 = 15,386 : x
  2. Step 2: Convert to fraction form
    18,081.68/24,940.16 = 15,386/x
  3. Step 3: Cross multiply
    18,081.68x = 24,940.16 × 15,386
  4. Step 4: Simplify right side
    18,081.68x = 383,729,301.76
  5. Step 5: Solve for x
    x = 383,729,301.76/18,081.68
  6. Step 6: Final answer
    x = 21,221.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.