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Finding the Fourth Proportional to 39,940.88, 59,912.39 and 12,238.88

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Solution

The fourth proportional to 39,940.88, 59,912.39 and 12,238.88 is: 18,358.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,940.88 : 59,912.39 = 12,238.88 : x
  2. Step 2: Convert to fraction form
    39,940.88/59,912.39 = 12,238.88/x
  3. Step 3: Cross multiply
    39,940.88x = 59,912.39 × 12,238.88
  4. Step 4: Simplify right side
    39,940.88x = 733,260,282.76
  5. Step 5: Solve for x
    x = 733,260,282.76/39,940.88
  6. Step 6: Final answer
    x = 18,358.64

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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.