Home / 20,791.37-28,687.84-11,836.51

Finding the Fourth Proportional to 20,791.37, 28,687.84 and 11,836.51

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Solution

The fourth proportional to 20,791.37, 28,687.84 and 11,836.51 is: 16,331.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.37 : 28,687.84 = 11,836.51 : x
  2. Step 2: Convert to fraction form
    20,791.37/28,687.84 = 11,836.51/x
  3. Step 3: Cross multiply
    20,791.37x = 28,687.84 × 11,836.51
  4. Step 4: Simplify right side
    20,791.37x = 339,563,845.86
  5. Step 5: Solve for x
    x = 339,563,845.86/20,791.37
  6. Step 6: Final answer
    x = 16,331.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.