Home / 20,786.92-31,183.45-7,638.26

Finding the Fourth Proportional to 20,786.92, 31,183.45 and 7,638.26

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Solution

The fourth proportional to 20,786.92, 31,183.45 and 7,638.26 is: 11,458.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.92 : 31,183.45 = 7,638.26 : x
  2. Step 2: Convert to fraction form
    20,786.92/31,183.45 = 7,638.26/x
  3. Step 3: Cross multiply
    20,786.92x = 31,183.45 × 7,638.26
  4. Step 4: Simplify right side
    20,786.92x = 238,187,161.98
  5. Step 5: Solve for x
    x = 238,187,161.98/20,786.92
  6. Step 6: Final answer
    x = 11,458.51

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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.