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Finding the Third Proportional to 6,878 and 9,319

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Solution

The third proportional to 6,878 and 9,319 is: 12,626.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878 : 9,319 = 9,319 : x
  2. Step 2: Convert to fraction form
    6,878/9,319 = 9,319/x
  3. Step 3: Cross multiply
    6,878x = 9,319 × 9,319
  4. Step 4: Simplify right side
    6,878x = 86,843,761
  5. Step 5: Solve for x
    x = 86,843,761/6,878
  6. Step 6: Final answer
    x = 12,626.31

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.