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Finding the Third Proportional to 3,086 and 3,871

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Solution

The third proportional to 3,086 and 3,871 is: 4,855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086 : 3,871 = 3,871 : x
  2. Step 2: Convert to fraction form
    3,086/3,871 = 3,871/x
  3. Step 3: Cross multiply
    3,086x = 3,871 × 3,871
  4. Step 4: Simplify right side
    3,086x = 14,984,641
  5. Step 5: Solve for x
    x = 14,984,641/3,086
  6. Step 6: Final answer
    x = 4,855.68

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.