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Finding the Third Proportional to 6,918 and 8,406

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Solution

The third proportional to 6,918 and 8,406 is: 10,214.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918 : 8,406 = 8,406 : x
  2. Step 2: Convert to fraction form
    6,918/8,406 = 8,406/x
  3. Step 3: Cross multiply
    6,918x = 8,406 × 8,406
  4. Step 4: Simplify right side
    6,918x = 70,660,836
  5. Step 5: Solve for x
    x = 70,660,836/6,918
  6. Step 6: Final answer
    x = 10,214.06

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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.