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Finding the Third Proportional to 13,991 and 30,775

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Solution

The third proportional to 13,991 and 30,775 is: 67,693.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991 : 30,775 = 30,775 : x
  2. Step 2: Convert to fraction form
    13,991/30,775 = 30,775/x
  3. Step 3: Cross multiply
    13,991x = 30,775 × 30,775
  4. Step 4: Simplify right side
    13,991x = 947,100,625
  5. Step 5: Solve for x
    x = 947,100,625/13,991
  6. Step 6: Final answer
    x = 67,693.56

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.