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Finding the Fourth Proportional to 40,388.81, 60,597.79 and 20,676.65

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Solution

The fourth proportional to 40,388.81, 60,597.79 and 20,676.65 is: 31,022.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,388.81 : 60,597.79 = 20,676.65 : x
  2. Step 2: Convert to fraction form
    40,388.81/60,597.79 = 20,676.65/x
  3. Step 3: Cross multiply
    40,388.81x = 60,597.79 × 20,676.65
  4. Step 4: Simplify right side
    40,388.81x = 1,252,958,939.92
  5. Step 5: Solve for x
    x = 1,252,958,939.92/40,388.81
  6. Step 6: Final answer
    x = 31,022.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.