Home / 6,811.88-10,219.28-2,131.79

Finding the Fourth Proportional to 6,811.88, 10,219.28 and 2,131.79

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Solution

The fourth proportional to 6,811.88, 10,219.28 and 2,131.79 is: 3,198.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,811.88 : 10,219.28 = 2,131.79 : x
  2. Step 2: Convert to fraction form
    6,811.88/10,219.28 = 2,131.79/x
  3. Step 3: Cross multiply
    6,811.88x = 10,219.28 × 2,131.79
  4. Step 4: Simplify right side
    6,811.88x = 21,785,297.16
  5. Step 5: Solve for x
    x = 21,785,297.16/6,811.88
  6. Step 6: Final answer
    x = 3,198.14

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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.