Home / 3,890.29-5,368.73-2,121.97

Finding the Fourth Proportional to 3,890.29, 5,368.73 and 2,121.97

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Solution

The fourth proportional to 3,890.29, 5,368.73 and 2,121.97 is: 2,928.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.29 : 5,368.73 = 2,121.97 : x
  2. Step 2: Convert to fraction form
    3,890.29/5,368.73 = 2,121.97/x
  3. Step 3: Cross multiply
    3,890.29x = 5,368.73 × 2,121.97
  4. Step 4: Simplify right side
    3,890.29x = 11,392,273.39
  5. Step 5: Solve for x
    x = 11,392,273.39/3,890.29
  6. Step 6: Final answer
    x = 2,928.39

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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.