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Finding the Third Proportional to 12,087 and 18,717.75

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Solution

The third proportional to 12,087 and 18,717.75 is: 28,986.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087 : 18,717.75 = 18,717.75 : x
  2. Step 2: Convert to fraction form
    12,087/18,717.75 = 18,717.75/x
  3. Step 3: Cross multiply
    12,087x = 18,717.75 × 18,717.75
  4. Step 4: Simplify right side
    12,087x = 350,354,165.06
  5. Step 5: Solve for x
    x = 350,354,165.06/12,087
  6. Step 6: Final answer
    x = 28,986.03

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.