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Finding the Third Proportional to 8,991 and 13,861

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Solution

The third proportional to 8,991 and 13,861 is: 21,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991 : 13,861 = 13,861 : x
  2. Step 2: Convert to fraction form
    8,991/13,861 = 13,861/x
  3. Step 3: Cross multiply
    8,991x = 13,861 × 13,861
  4. Step 4: Simplify right side
    8,991x = 192,127,321
  5. Step 5: Solve for x
    x = 192,127,321/8,991
  6. Step 6: Final answer
    x = 21,368.85

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.