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Finding the Third Proportional to 4,213.69 and 9,115.03

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Solution

The third proportional to 4,213.69 and 9,115.03 is: 19,717.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,213.69 : 9,115.03 = 9,115.03 : x
  2. Step 2: Convert to fraction form
    4,213.69/9,115.03 = 9,115.03/x
  3. Step 3: Cross multiply
    4,213.69x = 9,115.03 × 9,115.03
  4. Step 4: Simplify right side
    4,213.69x = 83,083,794.69
  5. Step 5: Solve for x
    x = 83,083,794.69/4,213.69
  6. Step 6: Final answer
    x = 19,717.60

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.