Home / 5,135.96-7,087.61-2,778.09

Finding the Fourth Proportional to 5,135.96, 7,087.61 and 2,778.09

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Solution

The fourth proportional to 5,135.96, 7,087.61 and 2,778.09 is: 3,833.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.96 : 7,087.61 = 2,778.09 : x
  2. Step 2: Convert to fraction form
    5,135.96/7,087.61 = 2,778.09/x
  3. Step 3: Cross multiply
    5,135.96x = 7,087.61 × 2,778.09
  4. Step 4: Simplify right side
    5,135.96x = 19,690,004.57
  5. Step 5: Solve for x
    x = 19,690,004.57/5,135.96
  6. Step 6: Final answer
    x = 3,833.76

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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.