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Finding the Third Proportional to 3,900 and 8,726

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Solution

The third proportional to 3,900 and 8,726 is: 19,523.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900 : 8,726 = 8,726 : x
  2. Step 2: Convert to fraction form
    3,900/8,726 = 8,726/x
  3. Step 3: Cross multiply
    3,900x = 8,726 × 8,726
  4. Step 4: Simplify right side
    3,900x = 76,143,076
  5. Step 5: Solve for x
    x = 76,143,076/3,900
  6. Step 6: Final answer
    x = 19,523.87

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Why These Related Problems?

These problems maintain the same ratio (2.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.