Home / 3,879.73-5,354.14-2,111.45

Finding the Fourth Proportional to 3,879.73, 5,354.14 and 2,111.45

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Solution

The fourth proportional to 3,879.73, 5,354.14 and 2,111.45 is: 2,913.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.73 : 5,354.14 = 2,111.45 : x
  2. Step 2: Convert to fraction form
    3,879.73/5,354.14 = 2,111.45/x
  3. Step 3: Cross multiply
    3,879.73x = 5,354.14 × 2,111.45
  4. Step 4: Simplify right side
    3,879.73x = 11,304,994.85
  5. Step 5: Solve for x
    x = 11,304,994.85/3,879.73
  6. Step 6: Final answer
    x = 2,913.86

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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.