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Finding the Third Proportional to 6,860 and 8,920

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Solution

The third proportional to 6,860 and 8,920 is: 11,598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,860 : 8,920 = 8,920 : x
  2. Step 2: Convert to fraction form
    6,860/8,920 = 8,920/x
  3. Step 3: Cross multiply
    6,860x = 8,920 × 8,920
  4. Step 4: Simplify right side
    6,860x = 79,566,400
  5. Step 5: Solve for x
    x = 79,566,400/6,860
  6. Step 6: Final answer
    x = 11,598.60

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.