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Finding the Third Proportional to 20,286 and 31,086

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Solution

The third proportional to 20,286 and 31,086 is: 47,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286 : 31,086 = 31,086 : x
  2. Step 2: Convert to fraction form
    20,286/31,086 = 31,086/x
  3. Step 3: Cross multiply
    20,286x = 31,086 × 31,086
  4. Step 4: Simplify right side
    20,286x = 966,339,396
  5. Step 5: Solve for x
    x = 966,339,396/20,286
  6. Step 6: Final answer
    x = 47,635.78

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1.5x scale

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.