Home / 5,418.71-8,129.19-3,079.79

Finding the Fourth Proportional to 5,418.71, 8,129.19 and 3,079.79

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Solution

The fourth proportional to 5,418.71, 8,129.19 and 3,079.79 is: 4,620.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.71 : 8,129.19 = 3,079.79 : x
  2. Step 2: Convert to fraction form
    5,418.71/8,129.19 = 3,079.79/x
  3. Step 3: Cross multiply
    5,418.71x = 8,129.19 × 3,079.79
  4. Step 4: Simplify right side
    5,418.71x = 25,036,157.42
  5. Step 5: Solve for x
    x = 25,036,157.42/5,418.71
  6. Step 6: Final answer
    x = 4,620.32

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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.