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Finding the Third Proportional to 3,860 and 5,160

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Solution

The third proportional to 3,860 and 5,160 is: 6,897.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860 : 5,160 = 5,160 : x
  2. Step 2: Convert to fraction form
    3,860/5,160 = 5,160/x
  3. Step 3: Cross multiply
    3,860x = 5,160 × 5,160
  4. Step 4: Simplify right side
    3,860x = 26,625,600
  5. Step 5: Solve for x
    x = 26,625,600/3,860
  6. Step 6: Final answer
    x = 6,897.82

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.