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Finding the Third Proportional to 4,990 and 10,349

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Solution

The third proportional to 4,990 and 10,349 is: 21,463.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990 : 10,349 = 10,349 : x
  2. Step 2: Convert to fraction form
    4,990/10,349 = 10,349/x
  3. Step 3: Cross multiply
    4,990x = 10,349 × 10,349
  4. Step 4: Simplify right side
    4,990x = 107,101,801
  5. Step 5: Solve for x
    x = 107,101,801/4,990
  6. Step 6: Final answer
    x = 21,463.29

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.