Home / 3,999.81-5,521.25-3,438.02

Finding the Fourth Proportional to 3,999.81, 5,521.25 and 3,438.02

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Solution

The fourth proportional to 3,999.81, 5,521.25 and 3,438.02 is: 4,745.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.81 : 5,521.25 = 3,438.02 : x
  2. Step 2: Convert to fraction form
    3,999.81/5,521.25 = 3,438.02/x
  3. Step 3: Cross multiply
    3,999.81x = 5,521.25 × 3,438.02
  4. Step 4: Simplify right side
    3,999.81x = 18,982,123.13
  5. Step 5: Solve for x
    x = 18,982,123.13/3,999.81
  6. Step 6: Final answer
    x = 4,745.76

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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.