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Finding the Third Proportional to 15,122.25 and 21,579.75

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Solution

The third proportional to 15,122.25 and 21,579.75 is: 30,794.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.25 : 21,579.75 = 21,579.75 : x
  2. Step 2: Convert to fraction form
    15,122.25/21,579.75 = 21,579.75/x
  3. Step 3: Cross multiply
    15,122.25x = 21,579.75 × 21,579.75
  4. Step 4: Simplify right side
    15,122.25x = 465,685,610.06
  5. Step 5: Solve for x
    x = 465,685,610.06/15,122.25
  6. Step 6: Final answer
    x = 30,794.73

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.