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Finding the Third Proportional to 18,722.81 and 28,469.39

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Solution

The third proportional to 18,722.81 and 28,469.39 is: 43,289.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.81 : 28,469.39 = 28,469.39 : x
  2. Step 2: Convert to fraction form
    18,722.81/28,469.39 = 28,469.39/x
  3. Step 3: Cross multiply
    18,722.81x = 28,469.39 × 28,469.39
  4. Step 4: Simplify right side
    18,722.81x = 810,506,202.56
  5. Step 5: Solve for x
    x = 810,506,202.56/18,722.81
  6. Step 6: Final answer
    x = 43,289.77

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.