Home / 3,930.30-5,890.59-1,981.44

Finding the Fourth Proportional to 3,930.30, 5,890.59 and 1,981.44

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Solution

The fourth proportional to 3,930.30, 5,890.59 and 1,981.44 is: 2,969.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.30 : 5,890.59 = 1,981.44 : x
  2. Step 2: Convert to fraction form
    3,930.30/5,890.59 = 1,981.44/x
  3. Step 3: Cross multiply
    3,930.30x = 5,890.59 × 1,981.44
  4. Step 4: Simplify right side
    3,930.30x = 11,671,850.65
  5. Step 5: Solve for x
    x = 11,671,850.65/3,930.30
  6. Step 6: Final answer
    x = 2,969.71

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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.