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Finding the Third Proportional to 20,947 and 45,174

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Solution

The third proportional to 20,947 and 45,174 is: 97,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947 : 45,174 = 45,174 : x
  2. Step 2: Convert to fraction form
    20,947/45,174 = 45,174/x
  3. Step 3: Cross multiply
    20,947x = 45,174 × 45,174
  4. Step 4: Simplify right side
    20,947x = 2,040,690,276
  5. Step 5: Solve for x
    x = 2,040,690,276/20,947
  6. Step 6: Final answer
    x = 97,421.60

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.