Home / 3,879.50-5,353.66-2,111.07

Finding the Fourth Proportional to 3,879.50, 5,353.66 and 2,111.07

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Solution

The fourth proportional to 3,879.50, 5,353.66 and 2,111.07 is: 2,913.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.50 : 5,353.66 = 2,111.07 : x
  2. Step 2: Convert to fraction form
    3,879.50/5,353.66 = 2,111.07/x
  3. Step 3: Cross multiply
    3,879.50x = 5,353.66 × 2,111.07
  4. Step 4: Simplify right side
    3,879.50x = 11,301,951.02
  5. Step 5: Solve for x
    x = 11,301,951.02/3,879.50
  6. Step 6: Final answer
    x = 2,913.25

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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.