Home / 5,418.90-8,129.34-2,131.92

Finding the Fourth Proportional to 5,418.90, 8,129.34 and 2,131.92

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Solution

The fourth proportional to 5,418.90, 8,129.34 and 2,131.92 is: 3,198.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.90 : 8,129.34 = 2,131.92 : x
  2. Step 2: Convert to fraction form
    5,418.90/8,129.34 = 2,131.92/x
  3. Step 3: Cross multiply
    5,418.90x = 8,129.34 × 2,131.92
  4. Step 4: Simplify right side
    5,418.90x = 17,331,102.53
  5. Step 5: Solve for x
    x = 17,331,102.53/5,418.90
  6. Step 6: Final answer
    x = 3,198.27

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1.5x scale

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.