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Finding the Third Proportional to 3,982 and 7,210

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Solution

The third proportional to 3,982 and 7,210 is: 13,054.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982 : 7,210 = 7,210 : x
  2. Step 2: Convert to fraction form
    3,982/7,210 = 7,210/x
  3. Step 3: Cross multiply
    3,982x = 7,210 × 7,210
  4. Step 4: Simplify right side
    3,982x = 51,984,100
  5. Step 5: Solve for x
    x = 51,984,100/3,982
  6. Step 6: Final answer
    x = 13,054.77

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.