Home / 13,839.91-20,760.93-3,979.96

Finding the Fourth Proportional to 13,839.91, 20,760.93 and 3,979.96

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Solution

The fourth proportional to 13,839.91, 20,760.93 and 3,979.96 is: 5,970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.91 : 20,760.93 = 3,979.96 : x
  2. Step 2: Convert to fraction form
    13,839.91/20,760.93 = 3,979.96/x
  3. Step 3: Cross multiply
    13,839.91x = 20,760.93 × 3,979.96
  4. Step 4: Simplify right side
    13,839.91x = 82,627,688.64
  5. Step 5: Solve for x
    x = 82,627,688.64/13,839.91
  6. Step 6: Final answer
    x = 5,970.25

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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.