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Finding the Third Proportional to 3,947 and 8,614

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Solution

The third proportional to 3,947 and 8,614 is: 18,799.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947 : 8,614 = 8,614 : x
  2. Step 2: Convert to fraction form
    3,947/8,614 = 8,614/x
  3. Step 3: Cross multiply
    3,947x = 8,614 × 8,614
  4. Step 4: Simplify right side
    3,947x = 74,200,996
  5. Step 5: Solve for x
    x = 74,200,996/3,947
  6. Step 6: Final answer
    x = 18,799.34

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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.