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Finding the Third Proportional to 2,864 and 7,115

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Solution

The third proportional to 2,864 and 7,115 is: 17,675.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,864 : 7,115 = 7,115 : x
  2. Step 2: Convert to fraction form
    2,864/7,115 = 7,115/x
  3. Step 3: Cross multiply
    2,864x = 7,115 × 7,115
  4. Step 4: Simplify right side
    2,864x = 50,623,225
  5. Step 5: Solve for x
    x = 50,623,225/2,864
  6. Step 6: Final answer
    x = 17,675.71

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.