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Finding the Third Proportional to 20,856 and 45,384

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Solution

The third proportional to 20,856 and 45,384 is: 98,758.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856 : 45,384 = 45,384 : x
  2. Step 2: Convert to fraction form
    20,856/45,384 = 45,384/x
  3. Step 3: Cross multiply
    20,856x = 45,384 × 45,384
  4. Step 4: Simplify right side
    20,856x = 2,059,707,456
  5. Step 5: Solve for x
    x = 2,059,707,456/20,856
  6. Step 6: Final answer
    x = 98,758.51

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.