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Finding the Third Proportional to 9,789 and 20,865

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Solution

The third proportional to 9,789 and 20,865 is: 44,473.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,789 : 20,865 = 20,865 : x
  2. Step 2: Convert to fraction form
    9,789/20,865 = 20,865/x
  3. Step 3: Cross multiply
    9,789x = 20,865 × 20,865
  4. Step 4: Simplify right side
    9,789x = 435,348,225
  5. Step 5: Solve for x
    x = 435,348,225/9,789
  6. Step 6: Final answer
    x = 44,473.21

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.