Home / 5,128.58-7,078.37-4,894.85

Finding the Fourth Proportional to 5,128.58, 7,078.37 and 4,894.85

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Solution

The fourth proportional to 5,128.58, 7,078.37 and 4,894.85 is: 6,755.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.58 : 7,078.37 = 4,894.85 : x
  2. Step 2: Convert to fraction form
    5,128.58/7,078.37 = 4,894.85/x
  3. Step 3: Cross multiply
    5,128.58x = 7,078.37 × 4,894.85
  4. Step 4: Simplify right side
    5,128.58x = 34,647,552.62
  5. Step 5: Solve for x
    x = 34,647,552.62/5,128.58
  6. Step 6: Final answer
    x = 6,755.78

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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.