Home / 3,891.78-5,370.57-2,123.46

Finding the Fourth Proportional to 3,891.78, 5,370.57 and 2,123.46

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Solution

The fourth proportional to 3,891.78, 5,370.57 and 2,123.46 is: 2,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.78 : 5,370.57 = 2,123.46 : x
  2. Step 2: Convert to fraction form
    3,891.78/5,370.57 = 2,123.46/x
  3. Step 3: Cross multiply
    3,891.78x = 5,370.57 × 2,123.46
  4. Step 4: Simplify right side
    3,891.78x = 11,404,190.57
  5. Step 5: Solve for x
    x = 11,404,190.57/3,891.78
  6. Step 6: Final answer
    x = 2,930.33

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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.