Home / 20,786.09-31,179.11-5,203.71

Finding the Fourth Proportional to 20,786.09, 31,179.11 and 5,203.71

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Solution

The fourth proportional to 20,786.09, 31,179.11 and 5,203.71 is: 7,805.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.09 : 31,179.11 = 5,203.71 : x
  2. Step 2: Convert to fraction form
    20,786.09/31,179.11 = 5,203.71/x
  3. Step 3: Cross multiply
    20,786.09x = 31,179.11 × 5,203.71
  4. Step 4: Simplify right side
    20,786.09x = 162,247,020.48
  5. Step 5: Solve for x
    x = 162,247,020.48/20,786.09
  6. Step 6: Final answer
    x = 7,805.56

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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.