Home / 3,990.03-5,507.45-2,311.85

Finding the Fourth Proportional to 3,990.03, 5,507.45 and 2,311.85

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Solution

The fourth proportional to 3,990.03, 5,507.45 and 2,311.85 is: 3,191.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.03 : 5,507.45 = 2,311.85 : x
  2. Step 2: Convert to fraction form
    3,990.03/5,507.45 = 2,311.85/x
  3. Step 3: Cross multiply
    3,990.03x = 5,507.45 × 2,311.85
  4. Step 4: Simplify right side
    3,990.03x = 12,732,359.19
  5. Step 5: Solve for x
    x = 12,732,359.19/3,990.03
  6. Step 6: Final answer
    x = 3,191.04

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1.5x scale

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.