Home / 3,721.08-5,131.68-2,879.09

Finding the Fourth Proportional to 3,721.08, 5,131.68 and 2,879.09

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Solution

The fourth proportional to 3,721.08, 5,131.68 and 2,879.09 is: 3,970.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.08 : 5,131.68 = 2,879.09 : x
  2. Step 2: Convert to fraction form
    3,721.08/5,131.68 = 2,879.09/x
  3. Step 3: Cross multiply
    3,721.08x = 5,131.68 × 2,879.09
  4. Step 4: Simplify right side
    3,721.08x = 14,774,568.57
  5. Step 5: Solve for x
    x = 14,774,568.57/3,721.08
  6. Step 6: Final answer
    x = 3,970.51

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1.5x scale

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.