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Finding the Third Proportional to 3,912 and 8,470.50

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Solution

The third proportional to 3,912 and 8,470.50 is: 18,340.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912 : 8,470.50 = 8,470.50 : x
  2. Step 2: Convert to fraction form
    3,912/8,470.50 = 8,470.50/x
  3. Step 3: Cross multiply
    3,912x = 8,470.50 × 8,470.50
  4. Step 4: Simplify right side
    3,912x = 71,749,370.25
  5. Step 5: Solve for x
    x = 71,749,370.25/3,912
  6. Step 6: Final answer
    x = 18,340.84

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.