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Finding the Third Proportional to 20,121 and 30,615

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Solution

The third proportional to 20,121 and 30,615 is: 46,582.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121 : 30,615 = 30,615 : x
  2. Step 2: Convert to fraction form
    20,121/30,615 = 30,615/x
  3. Step 3: Cross multiply
    20,121x = 30,615 × 30,615
  4. Step 4: Simplify right side
    20,121x = 937,278,225
  5. Step 5: Solve for x
    x = 937,278,225/20,121
  6. Step 6: Final answer
    x = 46,582.09

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.