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Finding the Third Proportional to 18,728.72 and 40,908.80

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Solution

The third proportional to 18,728.72 and 40,908.80 is: 89,356.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.72 : 40,908.80 = 40,908.80 : x
  2. Step 2: Convert to fraction form
    18,728.72/40,908.80 = 40,908.80/x
  3. Step 3: Cross multiply
    18,728.72x = 40,908.80 × 40,908.80
  4. Step 4: Simplify right side
    18,728.72x = 1,673,529,661.76
  5. Step 5: Solve for x
    x = 1,673,529,661.76/18,728.72
  6. Step 6: Final answer
    x = 89,356.33

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.