Home / 3,879.45-5,353.49-2,111.02

Finding the Fourth Proportional to 3,879.45, 5,353.49 and 2,111.02

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Solution

The fourth proportional to 3,879.45, 5,353.49 and 2,111.02 is: 2,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.45 : 5,353.49 = 2,111.02 : x
  2. Step 2: Convert to fraction form
    3,879.45/5,353.49 = 2,111.02/x
  3. Step 3: Cross multiply
    3,879.45x = 5,353.49 × 2,111.02
  4. Step 4: Simplify right side
    3,879.45x = 11,301,324.46
  5. Step 5: Solve for x
    x = 11,301,324.46/3,879.45
  6. Step 6: Final answer
    x = 2,913.13

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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.