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Finding the Third Proportional to 3,163.50 and 6,920.50

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Solution

The third proportional to 3,163.50 and 6,920.50 is: 15,139.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163.50 : 6,920.50 = 6,920.50 : x
  2. Step 2: Convert to fraction form
    3,163.50/6,920.50 = 6,920.50/x
  3. Step 3: Cross multiply
    3,163.50x = 6,920.50 × 6,920.50
  4. Step 4: Simplify right side
    3,163.50x = 47,893,320.25
  5. Step 5: Solve for x
    x = 47,893,320.25/3,163.50
  6. Step 6: Final answer
    x = 15,139.35

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.