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Finding the Third Proportional to 9,861 and 20,553

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Solution

The third proportional to 9,861 and 20,553 is: 42,838.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861 : 20,553 = 20,553 : x
  2. Step 2: Convert to fraction form
    9,861/20,553 = 20,553/x
  3. Step 3: Cross multiply
    9,861x = 20,553 × 20,553
  4. Step 4: Simplify right side
    9,861x = 422,425,809
  5. Step 5: Solve for x
    x = 422,425,809/9,861
  6. Step 6: Final answer
    x = 42,838.03

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.