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Finding the Third Proportional to 7,641 and 11,862

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Solution

The third proportional to 7,641 and 11,862 is: 18,414.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,641 : 11,862 = 11,862 : x
  2. Step 2: Convert to fraction form
    7,641/11,862 = 11,862/x
  3. Step 3: Cross multiply
    7,641x = 11,862 × 11,862
  4. Step 4: Simplify right side
    7,641x = 140,707,044
  5. Step 5: Solve for x
    x = 140,707,044/7,641
  6. Step 6: Final answer
    x = 18,414.74

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.