Home / 3,989.76-5,506.16-2,311.60

Finding the Fourth Proportional to 3,989.76, 5,506.16 and 2,311.60

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Solution

The fourth proportional to 3,989.76, 5,506.16 and 2,311.60 is: 3,190.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.76 : 5,506.16 = 2,311.60 : x
  2. Step 2: Convert to fraction form
    3,989.76/5,506.16 = 2,311.60/x
  3. Step 3: Cross multiply
    3,989.76x = 5,506.16 × 2,311.60
  4. Step 4: Simplify right side
    3,989.76x = 12,728,039.46
  5. Step 5: Solve for x
    x = 12,728,039.46/3,989.76
  6. Step 6: Final answer
    x = 3,190.18

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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.