Home / 3,869.40-5,811.24-2,021.76

Finding the Fourth Proportional to 3,869.40, 5,811.24 and 2,021.76

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Solution

The fourth proportional to 3,869.40, 5,811.24 and 2,021.76 is: 3,036.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.40 : 5,811.24 = 2,021.76 : x
  2. Step 2: Convert to fraction form
    3,869.40/5,811.24 = 2,021.76/x
  3. Step 3: Cross multiply
    3,869.40x = 5,811.24 × 2,021.76
  4. Step 4: Simplify right side
    3,869.40x = 11,748,932.58
  5. Step 5: Solve for x
    x = 11,748,932.58/3,869.40
  6. Step 6: Final answer
    x = 3,036.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.