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Finding the Third Proportional to 8,706.25 and 18,721.75

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Solution

The third proportional to 8,706.25 and 18,721.75 is: 40,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.25 : 18,721.75 = 18,721.75 : x
  2. Step 2: Convert to fraction form
    8,706.25/18,721.75 = 18,721.75/x
  3. Step 3: Cross multiply
    8,706.25x = 18,721.75 × 18,721.75
  4. Step 4: Simplify right side
    8,706.25x = 350,503,923.06
  5. Step 5: Solve for x
    x = 350,503,923.06/8,706.25
  6. Step 6: Final answer
    x = 40,258.89

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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.