Home / 5,216.25-7,198.43-3,120.87

Finding the Fourth Proportional to 5,216.25, 7,198.43 and 3,120.87

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Solution

The fourth proportional to 5,216.25, 7,198.43 and 3,120.87 is: 4,306.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,216.25 : 7,198.43 = 3,120.87 : x
  2. Step 2: Convert to fraction form
    5,216.25/7,198.43 = 3,120.87/x
  3. Step 3: Cross multiply
    5,216.25x = 7,198.43 × 3,120.87
  4. Step 4: Simplify right side
    5,216.25x = 22,465,364.23
  5. Step 5: Solve for x
    x = 22,465,364.23/5,216.25
  6. Step 6: Final answer
    x = 4,306.80

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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.