Home / 20,781.44-28,671.27-11,826.69

Finding the Fourth Proportional to 20,781.44, 28,671.27 and 11,826.69

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Solution

The fourth proportional to 20,781.44, 28,671.27 and 11,826.69 is: 16,316.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.44 : 28,671.27 = 11,826.69 : x
  2. Step 2: Convert to fraction form
    20,781.44/28,671.27 = 11,826.69/x
  3. Step 3: Cross multiply
    20,781.44x = 28,671.27 × 11,826.69
  4. Step 4: Simplify right side
    20,781.44x = 339,086,222.20
  5. Step 5: Solve for x
    x = 339,086,222.20/20,781.44
  6. Step 6: Final answer
    x = 16,316.79

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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.