Home / 5,238.66-7,857.44-2,120.28

Finding the Fourth Proportional to 5,238.66, 7,857.44 and 2,120.28

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Solution

The fourth proportional to 5,238.66, 7,857.44 and 2,120.28 is: 3,180.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,238.66 : 7,857.44 = 2,120.28 : x
  2. Step 2: Convert to fraction form
    5,238.66/7,857.44 = 2,120.28/x
  3. Step 3: Cross multiply
    5,238.66x = 7,857.44 × 2,120.28
  4. Step 4: Simplify right side
    5,238.66x = 16,659,972.88
  5. Step 5: Solve for x
    x = 16,659,972.88/5,238.66
  6. Step 6: Final answer
    x = 3,180.20

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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.