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Finding the Third Proportional to 6,999.75 and 7,911

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Solution

The third proportional to 6,999.75 and 7,911 is: 8,940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.75 : 7,911 = 7,911 : x
  2. Step 2: Convert to fraction form
    6,999.75/7,911 = 7,911/x
  3. Step 3: Cross multiply
    6,999.75x = 7,911 × 7,911
  4. Step 4: Simplify right side
    6,999.75x = 62,583,921
  5. Step 5: Solve for x
    x = 62,583,921/6,999.75
  6. Step 6: Final answer
    x = 8,940.88

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.