Home / 3,879.98-5,354.42-2,111.58

Finding the Fourth Proportional to 3,879.98, 5,354.42 and 2,111.58

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Solution

The fourth proportional to 3,879.98, 5,354.42 and 2,111.58 is: 2,914.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.98 : 5,354.42 = 2,111.58 : x
  2. Step 2: Convert to fraction form
    3,879.98/5,354.42 = 2,111.58/x
  3. Step 3: Cross multiply
    3,879.98x = 5,354.42 × 2,111.58
  4. Step 4: Simplify right side
    3,879.98x = 11,306,286.18
  5. Step 5: Solve for x
    x = 11,306,286.18/3,879.98
  6. Step 6: Final answer
    x = 2,914.01

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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.