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Finding the Fourth Proportional to 28,940.41, 43,404.02 and 13,939.87

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Solution

The fourth proportional to 28,940.41, 43,404.02 and 13,939.87 is: 20,906.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,940.41 : 43,404.02 = 13,939.87 : x
  2. Step 2: Convert to fraction form
    28,940.41/43,404.02 = 13,939.87/x
  3. Step 3: Cross multiply
    28,940.41x = 43,404.02 × 13,939.87
  4. Step 4: Simplify right side
    28,940.41x = 605,046,179.26
  5. Step 5: Solve for x
    x = 605,046,179.26/28,940.41
  6. Step 6: Final answer
    x = 20,906.62

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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.