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Finding the Third Proportional to 3,982 and 8,648

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Solution

The third proportional to 3,982 and 8,648 is: 18,781.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982 : 8,648 = 8,648 : x
  2. Step 2: Convert to fraction form
    3,982/8,648 = 8,648/x
  3. Step 3: Cross multiply
    3,982x = 8,648 × 8,648
  4. Step 4: Simplify right side
    3,982x = 74,787,904
  5. Step 5: Solve for x
    x = 74,787,904/3,982
  6. Step 6: Final answer
    x = 18,781.49

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.