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Finding the Third Proportional to 9,991.69 and 20,940.19

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Solution

The third proportional to 9,991.69 and 20,940.19 is: 43,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.69 : 20,940.19 = 20,940.19 : x
  2. Step 2: Convert to fraction form
    9,991.69/20,940.19 = 20,940.19/x
  3. Step 3: Cross multiply
    9,991.69x = 20,940.19 × 20,940.19
  4. Step 4: Simplify right side
    9,991.69x = 438,491,452.54
  5. Step 5: Solve for x
    x = 438,491,452.54/9,991.69
  6. Step 6: Final answer
    x = 43,885.63

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.