Home / 28,939.91-43,403.27-13,939.37

Finding the Fourth Proportional to 28,939.91, 43,403.27 and 13,939.37

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Solution

The fourth proportional to 28,939.91, 43,403.27 and 13,939.37 is: 20,905.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.91 : 43,403.27 = 13,939.37 : x
  2. Step 2: Convert to fraction form
    28,939.91/43,403.27 = 13,939.37/x
  3. Step 3: Cross multiply
    28,939.91x = 43,403.27 × 13,939.37
  4. Step 4: Simplify right side
    28,939.91x = 605,014,022.72
  5. Step 5: Solve for x
    x = 605,014,022.72/28,939.91
  6. Step 6: Final answer
    x = 20,905.87

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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.