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Finding the Third Proportional to 18,213.75 and 21,615.75

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Solution

The third proportional to 18,213.75 and 21,615.75 is: 25,653.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,213.75 : 21,615.75 = 21,615.75 : x
  2. Step 2: Convert to fraction form
    18,213.75/21,615.75 = 21,615.75/x
  3. Step 3: Cross multiply
    18,213.75x = 21,615.75 × 21,615.75
  4. Step 4: Simplify right side
    18,213.75x = 467,240,648.06
  5. Step 5: Solve for x
    x = 467,240,648.06/18,213.75
  6. Step 6: Final answer
    x = 25,653.18

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.