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Finding the Third Proportional to 30,924 and 39,906

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Solution

The third proportional to 30,924 and 39,906 is: 51,496.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,924 : 39,906 = 39,906 : x
  2. Step 2: Convert to fraction form
    30,924/39,906 = 39,906/x
  3. Step 3: Cross multiply
    30,924x = 39,906 × 39,906
  4. Step 4: Simplify right side
    30,924x = 1,592,488,836
  5. Step 5: Solve for x
    x = 1,592,488,836/30,924
  6. Step 6: Final answer
    x = 51,496.86

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.