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Finding the Third Proportional to 7,878 and 16,665

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Solution

The third proportional to 7,878 and 16,665 is: 35,252.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878 : 16,665 = 16,665 : x
  2. Step 2: Convert to fraction form
    7,878/16,665 = 16,665/x
  3. Step 3: Cross multiply
    7,878x = 16,665 × 16,665
  4. Step 4: Simplify right side
    7,878x = 277,722,225
  5. Step 5: Solve for x
    x = 277,722,225/7,878
  6. Step 6: Final answer
    x = 35,252.88

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.