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Finding the Third Proportional to 20,556 and 43,920

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Solution

The third proportional to 20,556 and 43,920 is: 93,839.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556 : 43,920 = 43,920 : x
  2. Step 2: Convert to fraction form
    20,556/43,920 = 43,920/x
  3. Step 3: Cross multiply
    20,556x = 43,920 × 43,920
  4. Step 4: Simplify right side
    20,556x = 1,928,966,400
  5. Step 5: Solve for x
    x = 1,928,966,400/20,556
  6. Step 6: Final answer
    x = 93,839.58

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.