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Finding the Third Proportional to 4,115 and 8,361

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Solution

The third proportional to 4,115 and 8,361 is: 16,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,115 : 8,361 = 8,361 : x
  2. Step 2: Convert to fraction form
    4,115/8,361 = 8,361/x
  3. Step 3: Cross multiply
    4,115x = 8,361 × 8,361
  4. Step 4: Simplify right side
    4,115x = 69,906,321
  5. Step 5: Solve for x
    x = 69,906,321/4,115
  6. Step 6: Final answer
    x = 16,988.17

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.