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Finding the Third Proportional to 7,682 and 11,971

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Solution

The third proportional to 7,682 and 11,971 is: 18,654.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,682 : 11,971 = 11,971 : x
  2. Step 2: Convert to fraction form
    7,682/11,971 = 11,971/x
  3. Step 3: Cross multiply
    7,682x = 11,971 × 11,971
  4. Step 4: Simplify right side
    7,682x = 143,304,841
  5. Step 5: Solve for x
    x = 143,304,841/7,682
  6. Step 6: Final answer
    x = 18,654.63

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.