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Finding the Third Proportional to 3,211.50 and 7,806

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Solution

The third proportional to 3,211.50 and 7,806 is: 18,973.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.50 : 7,806 = 7,806 : x
  2. Step 2: Convert to fraction form
    3,211.50/7,806 = 7,806/x
  3. Step 3: Cross multiply
    3,211.50x = 7,806 × 7,806
  4. Step 4: Simplify right side
    3,211.50x = 60,933,636
  5. Step 5: Solve for x
    x = 60,933,636/3,211.50
  6. Step 6: Final answer
    x = 18,973.57

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Why These Related Problems?

These problems maintain the same ratio (2.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.