Home / 5,287.21-7,930.19-1,391.92

Finding the Fourth Proportional to 5,287.21, 7,930.19 and 1,391.92

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Solution

The fourth proportional to 5,287.21, 7,930.19 and 1,391.92 is: 2,087.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.21 : 7,930.19 = 1,391.92 : x
  2. Step 2: Convert to fraction form
    5,287.21/7,930.19 = 1,391.92/x
  3. Step 3: Cross multiply
    5,287.21x = 7,930.19 × 1,391.92
  4. Step 4: Simplify right side
    5,287.21x = 11,038,183.11
  5. Step 5: Solve for x
    x = 11,038,183.11/5,287.21
  6. Step 6: Final answer
    x = 2,087.71

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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.