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Finding the Third Proportional to 20,697 and 31,712

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Solution

The third proportional to 20,697 and 31,712 is: 48,589.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697 : 31,712 = 31,712 : x
  2. Step 2: Convert to fraction form
    20,697/31,712 = 31,712/x
  3. Step 3: Cross multiply
    20,697x = 31,712 × 31,712
  4. Step 4: Simplify right side
    20,697x = 1,005,650,944
  5. Step 5: Solve for x
    x = 1,005,650,944/20,697
  6. Step 6: Final answer
    x = 48,589.21

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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.