Home / 5,138.68-7,091.37-2,780.83

Finding the Fourth Proportional to 5,138.68, 7,091.37 and 2,780.83

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Solution

The fourth proportional to 5,138.68, 7,091.37 and 2,780.83 is: 3,837.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.68 : 7,091.37 = 2,780.83 : x
  2. Step 2: Convert to fraction form
    5,138.68/7,091.37 = 2,780.83/x
  3. Step 3: Cross multiply
    5,138.68x = 7,091.37 × 2,780.83
  4. Step 4: Simplify right side
    5,138.68x = 19,719,894.44
  5. Step 5: Solve for x
    x = 19,719,894.44/5,138.68
  6. Step 6: Final answer
    x = 3,837.54

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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.