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Finding the Third Proportional to 20,407 and 29,912

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Solution

The third proportional to 20,407 and 29,912 is: 43,844.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407 : 29,912 = 29,912 : x
  2. Step 2: Convert to fraction form
    20,407/29,912 = 29,912/x
  3. Step 3: Cross multiply
    20,407x = 29,912 × 29,912
  4. Step 4: Simplify right side
    20,407x = 894,727,744
  5. Step 5: Solve for x
    x = 894,727,744/20,407
  6. Step 6: Final answer
    x = 43,844.16

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.