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Finding the Third Proportional to 7,899 and 16,991

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Solution

The third proportional to 7,899 and 16,991 is: 36,548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,899 : 16,991 = 16,991 : x
  2. Step 2: Convert to fraction form
    7,899/16,991 = 16,991/x
  3. Step 3: Cross multiply
    7,899x = 16,991 × 16,991
  4. Step 4: Simplify right side
    7,899x = 288,694,081
  5. Step 5: Solve for x
    x = 288,694,081/7,899
  6. Step 6: Final answer
    x = 36,548.18

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.