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Finding the Third Proportional to 3,969 and 8,670.80

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Solution

The third proportional to 3,969 and 8,670.80 is: 18,942.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969 : 8,670.80 = 8,670.80 : x
  2. Step 2: Convert to fraction form
    3,969/8,670.80 = 8,670.80/x
  3. Step 3: Cross multiply
    3,969x = 8,670.80 × 8,670.80
  4. Step 4: Simplify right side
    3,969x = 75,182,718.45
  5. Step 5: Solve for x
    x = 75,182,718.45/3,969
  6. Step 6: Final answer
    x = 18,942.48

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.