Home / 5,145.82-7,101.22-2,787.96

Finding the Fourth Proportional to 5,145.82, 7,101.22 and 2,787.96

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Solution

The fourth proportional to 5,145.82, 7,101.22 and 2,787.96 is: 3,847.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.82 : 7,101.22 = 2,787.96 : x
  2. Step 2: Convert to fraction form
    5,145.82/7,101.22 = 2,787.96/x
  3. Step 3: Cross multiply
    5,145.82x = 7,101.22 × 2,787.96
  4. Step 4: Simplify right side
    5,145.82x = 19,797,917.31
  5. Step 5: Solve for x
    x = 19,797,917.31/5,145.82
  6. Step 6: Final answer
    x = 3,847.38

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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.