Home / 5,198.61-7,174.12-2,840.81

Finding the Fourth Proportional to 5,198.61, 7,174.12 and 2,840.81

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Solution

The fourth proportional to 5,198.61, 7,174.12 and 2,840.81 is: 3,920.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.61 : 7,174.12 = 2,840.81 : x
  2. Step 2: Convert to fraction form
    5,198.61/7,174.12 = 2,840.81/x
  3. Step 3: Cross multiply
    5,198.61x = 7,174.12 × 2,840.81
  4. Step 4: Simplify right side
    5,198.61x = 20,380,311.84
  5. Step 5: Solve for x
    x = 20,380,311.84/5,198.61
  6. Step 6: Final answer
    x = 3,920.34

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Half scale
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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.