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Finding the Third Proportional to 3,171 and 6,989.25

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Solution

The third proportional to 3,171 and 6,989.25 is: 15,405.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171 : 6,989.25 = 6,989.25 : x
  2. Step 2: Convert to fraction form
    3,171/6,989.25 = 6,989.25/x
  3. Step 3: Cross multiply
    3,171x = 6,989.25 × 6,989.25
  4. Step 4: Simplify right side
    3,171x = 48,849,615.56
  5. Step 5: Solve for x
    x = 48,849,615.56/3,171
  6. Step 6: Final answer
    x = 15,405.11

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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.