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Finding the Third Proportional to 7,981 and 21,551

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Solution

The third proportional to 7,981 and 21,551 is: 58,193.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981 : 21,551 = 21,551 : x
  2. Step 2: Convert to fraction form
    7,981/21,551 = 21,551/x
  3. Step 3: Cross multiply
    7,981x = 21,551 × 21,551
  4. Step 4: Simplify right side
    7,981x = 464,445,601
  5. Step 5: Solve for x
    x = 464,445,601/7,981
  6. Step 6: Final answer
    x = 58,193.91

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.