Home / 3,891.92-5,370.77-2,123.42

Finding the Fourth Proportional to 3,891.92, 5,370.77 and 2,123.42

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Solution

The fourth proportional to 3,891.92, 5,370.77 and 2,123.42 is: 2,930.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.92 : 5,370.77 = 2,123.42 : x
  2. Step 2: Convert to fraction form
    3,891.92/5,370.77 = 2,123.42/x
  3. Step 3: Cross multiply
    3,891.92x = 5,370.77 × 2,123.42
  4. Step 4: Simplify right side
    3,891.92x = 11,404,378.89
  5. Step 5: Solve for x
    x = 11,404,378.89/3,891.92
  6. Step 6: Final answer
    x = 2,930.27

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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.