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Finding the Third Proportional to 6,988 and 9,878

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Solution

The third proportional to 6,988 and 9,878 is: 13,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988 : 9,878 = 9,878 : x
  2. Step 2: Convert to fraction form
    6,988/9,878 = 9,878/x
  3. Step 3: Cross multiply
    6,988x = 9,878 × 9,878
  4. Step 4: Simplify right side
    6,988x = 97,574,884
  5. Step 5: Solve for x
    x = 97,574,884/6,988
  6. Step 6: Final answer
    x = 13,963.21

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.