Home / 5,187.56-7,783.62-2,721.78

Finding the Fourth Proportional to 5,187.56, 7,783.62 and 2,721.78

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Solution

The fourth proportional to 5,187.56, 7,783.62 and 2,721.78 is: 4,083.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.56 : 7,783.62 = 2,721.78 : x
  2. Step 2: Convert to fraction form
    5,187.56/7,783.62 = 2,721.78/x
  3. Step 3: Cross multiply
    5,187.56x = 7,783.62 × 2,721.78
  4. Step 4: Simplify right side
    5,187.56x = 21,185,291.04
  5. Step 5: Solve for x
    x = 21,185,291.04/5,187.56
  6. Step 6: Final answer
    x = 4,083.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.