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Finding the Third Proportional to 3,121.88 and 6,820.88

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Solution

The third proportional to 3,121.88 and 6,820.88 is: 14,902.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.88 : 6,820.88 = 6,820.88 : x
  2. Step 2: Convert to fraction form
    3,121.88/6,820.88 = 6,820.88/x
  3. Step 3: Cross multiply
    3,121.88x = 6,820.88 × 6,820.88
  4. Step 4: Simplify right side
    3,121.88x = 46,524,335.77
  5. Step 5: Solve for x
    x = 46,524,335.77/3,121.88
  6. Step 6: Final answer
    x = 14,902.69

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.