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Finding the Fourth Proportional to 17,691.56, 26,543.73 and 8,919.87

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Solution

The fourth proportional to 17,691.56, 26,543.73 and 8,919.87 is: 13,383.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,691.56 : 26,543.73 = 8,919.87 : x
  2. Step 2: Convert to fraction form
    17,691.56/26,543.73 = 8,919.87/x
  3. Step 3: Cross multiply
    17,691.56x = 26,543.73 × 8,919.87
  4. Step 4: Simplify right side
    17,691.56x = 236,766,628.87
  5. Step 5: Solve for x
    x = 236,766,628.87/17,691.56
  6. Step 6: Final answer
    x = 13,383.02

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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.