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Finding the Fourth Proportional to 29,286.80, 43,879.80 and 13,672.40

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Solution

The fourth proportional to 29,286.80, 43,879.80 and 13,672.40 is: 20,485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,286.80 : 43,879.80 = 13,672.40 : x
  2. Step 2: Convert to fraction form
    29,286.80/43,879.80 = 13,672.40/x
  3. Step 3: Cross multiply
    29,286.80x = 43,879.80 × 13,672.40
  4. Step 4: Simplify right side
    29,286.80x = 599,942,177.52
  5. Step 5: Solve for x
    x = 599,942,177.52/29,286.80
  6. Step 6: Final answer
    x = 20,485.07

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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.