Home / 5,418.45-8,128.81-3,079.54

Finding the Fourth Proportional to 5,418.45, 8,128.81 and 3,079.54

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Solution

The fourth proportional to 5,418.45, 8,128.81 and 3,079.54 is: 4,619.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.45 : 8,128.81 = 3,079.54 : x
  2. Step 2: Convert to fraction form
    5,418.45/8,128.81 = 3,079.54/x
  3. Step 3: Cross multiply
    5,418.45x = 8,128.81 × 3,079.54
  4. Step 4: Simplify right side
    5,418.45x = 25,032,995.55
  5. Step 5: Solve for x
    x = 25,032,995.55/5,418.45
  6. Step 6: Final answer
    x = 4,619.96

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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.