Home / 3,823.79-5,731.98-2,091.20

Finding the Fourth Proportional to 3,823.79, 5,731.98 and 2,091.20

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Solution

The fourth proportional to 3,823.79, 5,731.98 and 2,091.20 is: 3,134.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,823.79 : 5,731.98 = 2,091.20 : x
  2. Step 2: Convert to fraction form
    3,823.79/5,731.98 = 2,091.20/x
  3. Step 3: Cross multiply
    3,823.79x = 5,731.98 × 2,091.20
  4. Step 4: Simplify right side
    3,823.79x = 11,986,687.92
  5. Step 5: Solve for x
    x = 11,986,687.92/3,823.79
  6. Step 6: Final answer
    x = 3,134.77

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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.