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Finding the Third Proportional to 20,217 and 30,903

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Solution

The third proportional to 20,217 and 30,903 is: 47,237.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217 : 30,903 = 30,903 : x
  2. Step 2: Convert to fraction form
    20,217/30,903 = 30,903/x
  3. Step 3: Cross multiply
    20,217x = 30,903 × 30,903
  4. Step 4: Simplify right side
    20,217x = 954,995,409
  5. Step 5: Solve for x
    x = 954,995,409/20,217
  6. Step 6: Final answer
    x = 47,237.25

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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.