Home / 2,811.12-3,879.36-1,552.20

Finding the Fourth Proportional to 2,811.12, 3,879.36 and 1,552.20

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Solution

The fourth proportional to 2,811.12, 3,879.36 and 1,552.20 is: 2,142.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.12 : 3,879.36 = 1,552.20 : x
  2. Step 2: Convert to fraction form
    2,811.12/3,879.36 = 1,552.20/x
  3. Step 3: Cross multiply
    2,811.12x = 3,879.36 × 1,552.20
  4. Step 4: Simplify right side
    2,811.12x = 6,021,542.59
  5. Step 5: Solve for x
    x = 6,021,542.59/2,811.12
  6. Step 6: Final answer
    x = 2,142.04

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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.