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Finding the Third Proportional to 20,397 and 28,724

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Solution

The third proportional to 20,397 and 28,724 is: 40,450.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397 : 28,724 = 28,724 : x
  2. Step 2: Convert to fraction form
    20,397/28,724 = 28,724/x
  3. Step 3: Cross multiply
    20,397x = 28,724 × 28,724
  4. Step 4: Simplify right side
    20,397x = 825,068,176
  5. Step 5: Solve for x
    x = 825,068,176/20,397
  6. Step 6: Final answer
    x = 40,450.47

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.