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Finding the Third Proportional to 3,808 and 8,191

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Solution

The third proportional to 3,808 and 8,191 is: 17,618.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808 : 8,191 = 8,191 : x
  2. Step 2: Convert to fraction form
    3,808/8,191 = 8,191/x
  3. Step 3: Cross multiply
    3,808x = 8,191 × 8,191
  4. Step 4: Simplify right side
    3,808x = 67,092,481
  5. Step 5: Solve for x
    x = 67,092,481/3,808
  6. Step 6: Final answer
    x = 17,618.82

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.