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Finding the Third Proportional to 18,987.75 and 27,867.38

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Solution

The third proportional to 18,987.75 and 27,867.38 is: 40,899.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.75 : 27,867.38 = 27,867.38 : x
  2. Step 2: Convert to fraction form
    18,987.75/27,867.38 = 27,867.38/x
  3. Step 3: Cross multiply
    18,987.75x = 27,867.38 × 27,867.38
  4. Step 4: Simplify right side
    18,987.75x = 776,590,589.39
  5. Step 5: Solve for x
    x = 776,590,589.39/18,987.75
  6. Step 6: Final answer
    x = 40,899.56

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.