Home / 20,786.86-31,180.20-5,204.44

Finding the Fourth Proportional to 20,786.86, 31,180.20 and 5,204.44

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Solution

The fourth proportional to 20,786.86, 31,180.20 and 5,204.44 is: 7,806.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.86 : 31,180.20 = 5,204.44 : x
  2. Step 2: Convert to fraction form
    20,786.86/31,180.20 = 5,204.44/x
  3. Step 3: Cross multiply
    20,786.86x = 31,180.20 × 5,204.44
  4. Step 4: Simplify right side
    20,786.86x = 162,275,480.09
  5. Step 5: Solve for x
    x = 162,275,480.09/20,786.86
  6. Step 6: Final answer
    x = 7,806.64

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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.