Home / 20,781.60-28,671.49-11,826.86

Finding the Fourth Proportional to 20,781.60, 28,671.49 and 11,826.86

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Solution

The fourth proportional to 20,781.60, 28,671.49 and 11,826.86 is: 16,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.60 : 28,671.49 = 11,826.86 : x
  2. Step 2: Convert to fraction form
    20,781.60/28,671.49 = 11,826.86/x
  3. Step 3: Cross multiply
    20,781.60x = 28,671.49 × 11,826.86
  4. Step 4: Simplify right side
    20,781.60x = 339,093,764.19
  5. Step 5: Solve for x
    x = 339,093,764.19/20,781.60
  6. Step 6: Final answer
    x = 16,317.02

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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.