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Finding the Third Proportional to 7,917.75 and 11,908.69

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Solution

The third proportional to 7,917.75 and 11,908.69 is: 17,911.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.75 : 11,908.69 = 11,908.69 : x
  2. Step 2: Convert to fraction form
    7,917.75/11,908.69 = 11,908.69/x
  3. Step 3: Cross multiply
    7,917.75x = 11,908.69 × 11,908.69
  4. Step 4: Simplify right side
    7,917.75x = 141,816,837.97
  5. Step 5: Solve for x
    x = 141,816,837.97/7,917.75
  6. Step 6: Final answer
    x = 17,911.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.