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Finding the Third Proportional to 4,170 and 8,340

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Solution

The third proportional to 4,170 and 8,340 is: 16,680

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,170 : 8,340 = 8,340 : x
  2. Step 2: Convert to fraction form
    4,170/8,340 = 8,340/x
  3. Step 3: Cross multiply
    4,170x = 8,340 × 8,340
  4. Step 4: Simplify right side
    4,170x = 69,555,600
  5. Step 5: Solve for x
    x = 69,555,600/4,170
  6. Step 6: Final answer
    x = 16,680

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Why These Related Problems?

These problems maintain the same ratio (2) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.