Home / 5,138.82-7,091.58-2,780.97

Finding the Fourth Proportional to 5,138.82, 7,091.58 and 2,780.97

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Solution

The fourth proportional to 5,138.82, 7,091.58 and 2,780.97 is: 3,837.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.82 : 7,091.58 = 2,780.97 : x
  2. Step 2: Convert to fraction form
    5,138.82/7,091.58 = 2,780.97/x
  3. Step 3: Cross multiply
    5,138.82x = 7,091.58 × 2,780.97
  4. Step 4: Simplify right side
    5,138.82x = 19,721,471.23
  5. Step 5: Solve for x
    x = 19,721,471.23/5,138.82
  6. Step 6: Final answer
    x = 3,837.74

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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.