Home / 3,892.20-5,371.23-2,123.81

Finding the Fourth Proportional to 3,892.20, 5,371.23 and 2,123.81

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Solution

The fourth proportional to 3,892.20, 5,371.23 and 2,123.81 is: 2,930.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,892.20 : 5,371.23 = 2,123.81 : x
  2. Step 2: Convert to fraction form
    3,892.20/5,371.23 = 2,123.81/x
  3. Step 3: Cross multiply
    3,892.20x = 5,371.23 × 2,123.81
  4. Step 4: Simplify right side
    3,892.20x = 11,407,445.13
  5. Step 5: Solve for x
    x = 11,407,445.13/3,892.20
  6. Step 6: Final answer
    x = 2,930.85

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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.