Home / 5,198.31-7,173.63-2,840.40

Finding the Fourth Proportional to 5,198.31, 7,173.63 and 2,840.40

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Solution

The fourth proportional to 5,198.31, 7,173.63 and 2,840.40 is: 3,919.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.31 : 7,173.63 = 2,840.40 : x
  2. Step 2: Convert to fraction form
    5,198.31/7,173.63 = 2,840.40/x
  3. Step 3: Cross multiply
    5,198.31x = 7,173.63 × 2,840.40
  4. Step 4: Simplify right side
    5,198.31x = 20,375,978.65
  5. Step 5: Solve for x
    x = 20,375,978.65/5,198.31
  6. Step 6: Final answer
    x = 3,919.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.