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Finding the Third Proportional to 18,555.75 and 20,013.75

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Solution

The third proportional to 18,555.75 and 20,013.75 is: 21,586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.75 : 20,013.75 = 20,013.75 : x
  2. Step 2: Convert to fraction form
    18,555.75/20,013.75 = 20,013.75/x
  3. Step 3: Cross multiply
    18,555.75x = 20,013.75 × 20,013.75
  4. Step 4: Simplify right side
    18,555.75x = 400,550,189.06
  5. Step 5: Solve for x
    x = 400,550,189.06/18,555.75
  6. Step 6: Final answer
    x = 21,586.31

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.