Home / 2,091.54-3,128.76-1,391.70

Finding the Fourth Proportional to 2,091.54, 3,128.76 and 1,391.70

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Solution

The fourth proportional to 2,091.54, 3,128.76 and 1,391.70 is: 2,081.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.54 : 3,128.76 = 1,391.70 : x
  2. Step 2: Convert to fraction form
    2,091.54/3,128.76 = 1,391.70/x
  3. Step 3: Cross multiply
    2,091.54x = 3,128.76 × 1,391.70
  4. Step 4: Simplify right side
    2,091.54x = 4,354,295.29
  5. Step 5: Solve for x
    x = 4,354,295.29/2,091.54
  6. Step 6: Final answer
    x = 2,081.86

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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.