Home / 3,720.78-5,134.19-2,187.79

Finding the Fourth Proportional to 3,720.78, 5,134.19 and 2,187.79

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Solution

The fourth proportional to 3,720.78, 5,134.19 and 2,187.79 is: 3,018.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.78 : 5,134.19 = 2,187.79 : x
  2. Step 2: Convert to fraction form
    3,720.78/5,134.19 = 2,187.79/x
  3. Step 3: Cross multiply
    3,720.78x = 5,134.19 × 2,187.79
  4. Step 4: Simplify right side
    3,720.78x = 11,232,505.77
  5. Step 5: Solve for x
    x = 11,232,505.77/3,720.78
  6. Step 6: Final answer
    x = 3,018.86

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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.