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Finding the Third Proportional to 11,921 and 26,230

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Solution

The third proportional to 11,921 and 26,230 is: 57,714.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921 : 26,230 = 26,230 : x
  2. Step 2: Convert to fraction form
    11,921/26,230 = 26,230/x
  3. Step 3: Cross multiply
    11,921x = 26,230 × 26,230
  4. Step 4: Simplify right side
    11,921x = 688,012,900
  5. Step 5: Solve for x
    x = 688,012,900/11,921
  6. Step 6: Final answer
    x = 57,714.36

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.