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Finding the Third Proportional to 6,878 and 8,378

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Solution

The third proportional to 6,878 and 8,378 is: 10,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878 : 8,378 = 8,378 : x
  2. Step 2: Convert to fraction form
    6,878/8,378 = 8,378/x
  3. Step 3: Cross multiply
    6,878x = 8,378 × 8,378
  4. Step 4: Simplify right side
    6,878x = 70,190,884
  5. Step 5: Solve for x
    x = 70,190,884/6,878
  6. Step 6: Final answer
    x = 10,205.13

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.