Home / 5,128.31-7,694.87-2,788.22

Finding the Fourth Proportional to 5,128.31, 7,694.87 and 2,788.22

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Solution

The fourth proportional to 5,128.31, 7,694.87 and 2,788.22 is: 4,183.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.31 : 7,694.87 = 2,788.22 : x
  2. Step 2: Convert to fraction form
    5,128.31/7,694.87 = 2,788.22/x
  3. Step 3: Cross multiply
    5,128.31x = 7,694.87 × 2,788.22
  4. Step 4: Simplify right side
    5,128.31x = 21,454,995.73
  5. Step 5: Solve for x
    x = 21,454,995.73/5,128.31
  6. Step 6: Final answer
    x = 4,183.64

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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.