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Finding the Third Proportional to 3,939 and 8,286

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Solution

The third proportional to 3,939 and 8,286 is: 17,430.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939 : 8,286 = 8,286 : x
  2. Step 2: Convert to fraction form
    3,939/8,286 = 8,286/x
  3. Step 3: Cross multiply
    3,939x = 8,286 × 8,286
  4. Step 4: Simplify right side
    3,939x = 68,657,796
  5. Step 5: Solve for x
    x = 68,657,796/3,939
  6. Step 6: Final answer
    x = 17,430.26

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.