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Finding the Third Proportional to 3,969 and 9,191.50

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Solution

The third proportional to 3,969 and 9,191.50 is: 21,285.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969 : 9,191.50 = 9,191.50 : x
  2. Step 2: Convert to fraction form
    3,969/9,191.50 = 9,191.50/x
  3. Step 3: Cross multiply
    3,969x = 9,191.50 × 9,191.50
  4. Step 4: Simplify right side
    3,969x = 84,483,672.25
  5. Step 5: Solve for x
    x = 84,483,672.25/3,969
  6. Step 6: Final answer
    x = 21,285.88

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.