Home / 3,990.53-5,506.67-2,311.80

Finding the Fourth Proportional to 3,990.53, 5,506.67 and 2,311.80

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Solution

The fourth proportional to 3,990.53, 5,506.67 and 2,311.80 is: 3,190.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.53 : 5,506.67 = 2,311.80 : x
  2. Step 2: Convert to fraction form
    3,990.53/5,506.67 = 2,311.80/x
  3. Step 3: Cross multiply
    3,990.53x = 5,506.67 × 2,311.80
  4. Step 4: Simplify right side
    3,990.53x = 12,730,319.71
  5. Step 5: Solve for x
    x = 12,730,319.71/3,990.53
  6. Step 6: Final answer
    x = 3,190.13

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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.