Home / 3,902.11-5,385.15-2,309.99

Finding the Fourth Proportional to 3,902.11, 5,385.15 and 2,309.99

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Solution

The fourth proportional to 3,902.11, 5,385.15 and 2,309.99 is: 3,187.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.11 : 5,385.15 = 2,309.99 : x
  2. Step 2: Convert to fraction form
    3,902.11/5,385.15 = 2,309.99/x
  3. Step 3: Cross multiply
    3,902.11x = 5,385.15 × 2,309.99
  4. Step 4: Simplify right side
    3,902.11x = 12,439,615.72
  5. Step 5: Solve for x
    x = 12,439,615.72/3,902.11
  6. Step 6: Final answer
    x = 3,187.92

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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.