Home / 2,157.91-3,221.24-1,867.32

Finding the Fourth Proportional to 2,157.91, 3,221.24 and 1,867.32

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Solution

The fourth proportional to 2,157.91, 3,221.24 and 1,867.32 is: 2,787.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.91 : 3,221.24 = 1,867.32 : x
  2. Step 2: Convert to fraction form
    2,157.91/3,221.24 = 1,867.32/x
  3. Step 3: Cross multiply
    2,157.91x = 3,221.24 × 1,867.32
  4. Step 4: Simplify right side
    2,157.91x = 6,015,076.54
  5. Step 5: Solve for x
    x = 6,015,076.54/2,157.91
  6. Step 6: Final answer
    x = 2,787.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.