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Finding the Third Proportional to 8,991 and 13,731

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Solution

The third proportional to 8,991 and 13,731 is: 20,969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991 : 13,731 = 13,731 : x
  2. Step 2: Convert to fraction form
    8,991/13,731 = 13,731/x
  3. Step 3: Cross multiply
    8,991x = 13,731 × 13,731
  4. Step 4: Simplify right side
    8,991x = 188,540,361
  5. Step 5: Solve for x
    x = 188,540,361/8,991
  6. Step 6: Final answer
    x = 20,969.90

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.