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Finding the Third Proportional to 3,915 and 8,375

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Solution

The third proportional to 3,915 and 8,375 is: 17,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915 : 8,375 = 8,375 : x
  2. Step 2: Convert to fraction form
    3,915/8,375 = 8,375/x
  3. Step 3: Cross multiply
    3,915x = 8,375 × 8,375
  4. Step 4: Simplify right side
    3,915x = 70,140,625
  5. Step 5: Solve for x
    x = 70,140,625/3,915
  6. Step 6: Final answer
    x = 17,915.87

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.