Home / 5,419.12-8,129.40-2,131.96

Finding the Fourth Proportional to 5,419.12, 8,129.40 and 2,131.96

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Solution

The fourth proportional to 5,419.12, 8,129.40 and 2,131.96 is: 3,198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.12 : 8,129.40 = 2,131.96 : x
  2. Step 2: Convert to fraction form
    5,419.12/8,129.40 = 2,131.96/x
  3. Step 3: Cross multiply
    5,419.12x = 8,129.40 × 2,131.96
  4. Step 4: Simplify right side
    5,419.12x = 17,331,555.62
  5. Step 5: Solve for x
    x = 17,331,555.62/5,419.12
  6. Step 6: Final answer
    x = 3,198.22

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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.