Home / 20,786.76-31,179.92-5,204.38

Finding the Fourth Proportional to 20,786.76, 31,179.92 and 5,204.38

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Solution

The fourth proportional to 20,786.76, 31,179.92 and 5,204.38 is: 7,806.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.76 : 31,179.92 = 5,204.38 : x
  2. Step 2: Convert to fraction form
    20,786.76/31,179.92 = 5,204.38/x
  3. Step 3: Cross multiply
    20,786.76x = 31,179.92 × 5,204.38
  4. Step 4: Simplify right side
    20,786.76x = 162,272,152.05
  5. Step 5: Solve for x
    x = 162,272,152.05/20,786.76
  6. Step 6: Final answer
    x = 7,806.51

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1.5x scale

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.