Home / 20,826.05-28,738.22-11,871.86

Finding the Fourth Proportional to 20,826.05, 28,738.22 and 11,871.86

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Solution

The fourth proportional to 20,826.05, 28,738.22 and 11,871.86 is: 16,382.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.05 : 28,738.22 = 11,871.86 : x
  2. Step 2: Convert to fraction form
    20,826.05/28,738.22 = 11,871.86/x
  3. Step 3: Cross multiply
    20,826.05x = 28,738.22 × 11,871.86
  4. Step 4: Simplify right side
    20,826.05x = 341,175,921.44
  5. Step 5: Solve for x
    x = 341,175,921.44/20,826.05
  6. Step 6: Final answer
    x = 16,382.18

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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.