Home / 5,240.82-7,859.21-2,120.03

Finding the Fourth Proportional to 5,240.82, 7,859.21 and 2,120.03

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Solution

The fourth proportional to 5,240.82, 7,859.21 and 2,120.03 is: 3,179.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240.82 : 7,859.21 = 2,120.03 : x
  2. Step 2: Convert to fraction form
    5,240.82/7,859.21 = 2,120.03/x
  3. Step 3: Cross multiply
    5,240.82x = 7,859.21 × 2,120.03
  4. Step 4: Simplify right side
    5,240.82x = 16,661,711.08
  5. Step 5: Solve for x
    x = 16,661,711.08/5,240.82
  6. Step 6: Final answer
    x = 3,179.22

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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.