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Finding the Third Proportional to 3,172 and 7,660

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Solution

The third proportional to 3,172 and 7,660 is: 18,497.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172 : 7,660 = 7,660 : x
  2. Step 2: Convert to fraction form
    3,172/7,660 = 7,660/x
  3. Step 3: Cross multiply
    3,172x = 7,660 × 7,660
  4. Step 4: Simplify right side
    3,172x = 58,675,600
  5. Step 5: Solve for x
    x = 58,675,600/3,172
  6. Step 6: Final answer
    x = 18,497.98

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.