Home / 3,990.06-5,506.38-2,311.47

Finding the Fourth Proportional to 3,990.06, 5,506.38 and 2,311.47

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Solution

The fourth proportional to 3,990.06, 5,506.38 and 2,311.47 is: 3,189.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.06 : 5,506.38 = 2,311.47 : x
  2. Step 2: Convert to fraction form
    3,990.06/5,506.38 = 2,311.47/x
  3. Step 3: Cross multiply
    3,990.06x = 5,506.38 × 2,311.47
  4. Step 4: Simplify right side
    3,990.06x = 12,727,832.18
  5. Step 5: Solve for x
    x = 12,727,832.18/3,990.06
  6. Step 6: Final answer
    x = 3,189.88

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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.