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Finding the Third Proportional to 20,728 and 33,376

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Solution

The third proportional to 20,728 and 33,376 is: 53,741.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728 : 33,376 = 33,376 : x
  2. Step 2: Convert to fraction form
    20,728/33,376 = 33,376/x
  3. Step 3: Cross multiply
    20,728x = 33,376 × 33,376
  4. Step 4: Simplify right side
    20,728x = 1,113,957,376
  5. Step 5: Solve for x
    x = 1,113,957,376/20,728
  6. Step 6: Final answer
    x = 53,741.67

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.