Home / 3,111.12-4,292.87-1,993.05

Finding the Fourth Proportional to 3,111.12, 4,292.87 and 1,993.05

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Solution

The fourth proportional to 3,111.12, 4,292.87 and 1,993.05 is: 2,750.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.12 : 4,292.87 = 1,993.05 : x
  2. Step 2: Convert to fraction form
    3,111.12/4,292.87 = 1,993.05/x
  3. Step 3: Cross multiply
    3,111.12x = 4,292.87 × 1,993.05
  4. Step 4: Simplify right side
    3,111.12x = 8,555,894.59
  5. Step 5: Solve for x
    x = 8,555,894.59/3,111.12
  6. Step 6: Final answer
    x = 2,750.10

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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.