Home / 3,879.60-5,353.76-2,111.26

Finding the Fourth Proportional to 3,879.60, 5,353.76 and 2,111.26

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Solution

The fourth proportional to 3,879.60, 5,353.76 and 2,111.26 is: 2,913.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.60 : 5,353.76 = 2,111.26 : x
  2. Step 2: Convert to fraction form
    3,879.60/5,353.76 = 2,111.26/x
  3. Step 3: Cross multiply
    3,879.60x = 5,353.76 × 2,111.26
  4. Step 4: Simplify right side
    3,879.60x = 11,303,179.34
  5. Step 5: Solve for x
    x = 11,303,179.34/3,879.60
  6. Step 6: Final answer
    x = 2,913.49

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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.