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Finding the Fourth Proportional to 40,494.69, 60,760.49 and 20,787.09

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Solution

The fourth proportional to 40,494.69, 60,760.49 and 20,787.09 is: 31,190.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,494.69 : 60,760.49 = 20,787.09 : x
  2. Step 2: Convert to fraction form
    40,494.69/60,760.49 = 20,787.09/x
  3. Step 3: Cross multiply
    40,494.69x = 60,760.49 × 20,787.09
  4. Step 4: Simplify right side
    40,494.69x = 1,263,033,670.14
  5. Step 5: Solve for x
    x = 1,263,033,670.14/40,494.69
  6. Step 6: Final answer
    x = 31,190.11

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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.