Home / 5,198.30-7,791.69-3,121.10

Finding the Fourth Proportional to 5,198.30, 7,791.69 and 3,121.10

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Solution

The fourth proportional to 5,198.30, 7,791.69 and 3,121.10 is: 4,678.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.30 : 7,791.69 = 3,121.10 : x
  2. Step 2: Convert to fraction form
    5,198.30/7,791.69 = 3,121.10/x
  3. Step 3: Cross multiply
    5,198.30x = 7,791.69 × 3,121.10
  4. Step 4: Simplify right side
    5,198.30x = 24,318,643.66
  5. Step 5: Solve for x
    x = 24,318,643.66/5,198.30
  6. Step 6: Final answer
    x = 4,678.19

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1.5x scale

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.