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Finding the Third Proportional to 3,213.50 and 6,905

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Solution

The third proportional to 3,213.50 and 6,905 is: 14,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.50 : 6,905 = 6,905 : x
  2. Step 2: Convert to fraction form
    3,213.50/6,905 = 6,905/x
  3. Step 3: Cross multiply
    3,213.50x = 6,905 × 6,905
  4. Step 4: Simplify right side
    3,213.50x = 47,679,025
  5. Step 5: Solve for x
    x = 47,679,025/3,213.50
  6. Step 6: Final answer
    x = 14,837.10

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.