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Finding the Third Proportional to 18,939.76 and 28,986.29

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Solution

The third proportional to 18,939.76 and 28,986.29 is: 44,361.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.76 : 28,986.29 = 28,986.29 : x
  2. Step 2: Convert to fraction form
    18,939.76/28,986.29 = 28,986.29/x
  3. Step 3: Cross multiply
    18,939.76x = 28,986.29 × 28,986.29
  4. Step 4: Simplify right side
    18,939.76x = 840,205,180.07
  5. Step 5: Solve for x
    x = 840,205,180.07/18,939.76
  6. Step 6: Final answer
    x = 44,361.97

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.