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Finding the Fourth Proportional to 17,910.80, 26,869.80 and 15,009.20

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Solution

The fourth proportional to 17,910.80, 26,869.80 and 15,009.20 is: 22,516.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,910.80 : 26,869.80 = 15,009.20 : x
  2. Step 2: Convert to fraction form
    17,910.80/26,869.80 = 15,009.20/x
  3. Step 3: Cross multiply
    17,910.80x = 26,869.80 × 15,009.20
  4. Step 4: Simplify right side
    17,910.80x = 403,294,202.16
  5. Step 5: Solve for x
    x = 403,294,202.16/17,910.80
  6. Step 6: Final answer
    x = 22,516.82

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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.