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Finding the Third Proportional to 10,917.75 and 15,369.75

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Solution

The third proportional to 10,917.75 and 15,369.75 is: 21,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.75 : 15,369.75 = 15,369.75 : x
  2. Step 2: Convert to fraction form
    10,917.75/15,369.75 = 15,369.75/x
  3. Step 3: Cross multiply
    10,917.75x = 15,369.75 × 15,369.75
  4. Step 4: Simplify right side
    10,917.75x = 236,229,215.06
  5. Step 5: Solve for x
    x = 236,229,215.06/10,917.75
  6. Step 6: Final answer
    x = 21,637.17

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.