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Finding the Fourth Proportional to 17,721.76, 26,559.44 and 8,951.92

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Solution

The fourth proportional to 17,721.76, 26,559.44 and 8,951.92 is: 13,416.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,721.76 : 26,559.44 = 8,951.92 : x
  2. Step 2: Convert to fraction form
    17,721.76/26,559.44 = 8,951.92/x
  3. Step 3: Cross multiply
    17,721.76x = 26,559.44 × 8,951.92
  4. Step 4: Simplify right side
    17,721.76x = 237,757,982.12
  5. Step 5: Solve for x
    x = 237,757,982.12/17,721.76
  6. Step 6: Final answer
    x = 13,416.16

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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.