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Finding the Third Proportional to 18,515.25 and 39,501

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Solution

The third proportional to 18,515.25 and 39,501 is: 84,272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.25 : 39,501 = 39,501 : x
  2. Step 2: Convert to fraction form
    18,515.25/39,501 = 39,501/x
  3. Step 3: Cross multiply
    18,515.25x = 39,501 × 39,501
  4. Step 4: Simplify right side
    18,515.25x = 1,560,329,001
  5. Step 5: Solve for x
    x = 1,560,329,001/18,515.25
  6. Step 6: Final answer
    x = 84,272.64

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.