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Finding the Third Proportional to 13,979 and 30,415

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Solution

The third proportional to 13,979 and 30,415 is: 66,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979 : 30,415 = 30,415 : x
  2. Step 2: Convert to fraction form
    13,979/30,415 = 30,415/x
  3. Step 3: Cross multiply
    13,979x = 30,415 × 30,415
  4. Step 4: Simplify right side
    13,979x = 925,072,225
  5. Step 5: Solve for x
    x = 925,072,225/13,979
  6. Step 6: Final answer
    x = 66,175.85

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.