Home / 5,216.20-7,199.86-3,121.56

Finding the Fourth Proportional to 5,216.20, 7,199.86 and 3,121.56

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Solution

The fourth proportional to 5,216.20, 7,199.86 and 3,121.56 is: 4,308.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,216.20 : 7,199.86 = 3,121.56 : x
  2. Step 2: Convert to fraction form
    5,216.20/7,199.86 = 3,121.56/x
  3. Step 3: Cross multiply
    5,216.20x = 7,199.86 × 3,121.56
  4. Step 4: Simplify right side
    5,216.20x = 22,474,794.98
  5. Step 5: Solve for x
    x = 22,474,794.98/5,216.20
  6. Step 6: Final answer
    x = 4,308.65

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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.