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Finding the Third Proportional to 21,126.75 and 45,930

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Solution

The third proportional to 21,126.75 and 45,930 is: 99,852.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.75 : 45,930 = 45,930 : x
  2. Step 2: Convert to fraction form
    21,126.75/45,930 = 45,930/x
  3. Step 3: Cross multiply
    21,126.75x = 45,930 × 45,930
  4. Step 4: Simplify right side
    21,126.75x = 2,109,564,900
  5. Step 5: Solve for x
    x = 2,109,564,900/21,126.75
  6. Step 6: Final answer
    x = 99,852.79

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.