Home / 3,131.36-4,329.36-2,993.60

Finding the Fourth Proportional to 3,131.36, 4,329.36 and 2,993.60

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Solution

The fourth proportional to 3,131.36, 4,329.36 and 2,993.60 is: 4,138.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.36 : 4,329.36 = 2,993.60 : x
  2. Step 2: Convert to fraction form
    3,131.36/4,329.36 = 2,993.60/x
  3. Step 3: Cross multiply
    3,131.36x = 4,329.36 × 2,993.60
  4. Step 4: Simplify right side
    3,131.36x = 12,960,372.10
  5. Step 5: Solve for x
    x = 12,960,372.10/3,131.36
  6. Step 6: Final answer
    x = 4,138.90

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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.