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Finding the Fourth Proportional to 18,489.76, 27,695.40 and 17,167.84

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Solution

The fourth proportional to 18,489.76, 27,695.40 and 17,167.84 is: 25,715.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.76 : 27,695.40 = 17,167.84 : x
  2. Step 2: Convert to fraction form
    18,489.76/27,695.40 = 17,167.84/x
  3. Step 3: Cross multiply
    18,489.76x = 27,695.40 × 17,167.84
  4. Step 4: Simplify right side
    18,489.76x = 475,470,195.94
  5. Step 5: Solve for x
    x = 475,470,195.94/18,489.76
  6. Step 6: Final answer
    x = 25,715.33

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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.