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Finding the Third Proportional to 3,189 and 7,012.50

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Solution

The third proportional to 3,189 and 7,012.50 is: 15,420.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189 : 7,012.50 = 7,012.50 : x
  2. Step 2: Convert to fraction form
    3,189/7,012.50 = 7,012.50/x
  3. Step 3: Cross multiply
    3,189x = 7,012.50 × 7,012.50
  4. Step 4: Simplify right side
    3,189x = 49,175,156.25
  5. Step 5: Solve for x
    x = 49,175,156.25/3,189
  6. Step 6: Final answer
    x = 15,420.24

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.