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Finding the Third Proportional to 20,433 and 31,242

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Solution

The third proportional to 20,433 and 31,242 is: 47,768.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,433 : 31,242 = 31,242 : x
  2. Step 2: Convert to fraction form
    20,433/31,242 = 31,242/x
  3. Step 3: Cross multiply
    20,433x = 31,242 × 31,242
  4. Step 4: Simplify right side
    20,433x = 976,062,564
  5. Step 5: Solve for x
    x = 976,062,564/20,433
  6. Step 6: Final answer
    x = 47,768.93

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.