Home / 3,989.24-5,505.45-2,311.10

Finding the Fourth Proportional to 3,989.24, 5,505.45 and 2,311.10

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Solution

The fourth proportional to 3,989.24, 5,505.45 and 2,311.10 is: 3,189.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.24 : 5,505.45 = 2,311.10 : x
  2. Step 2: Convert to fraction form
    3,989.24/5,505.45 = 2,311.10/x
  3. Step 3: Cross multiply
    3,989.24x = 5,505.45 × 2,311.10
  4. Step 4: Simplify right side
    3,989.24x = 12,723,645.50
  5. Step 5: Solve for x
    x = 12,723,645.50/3,989.24
  6. Step 6: Final answer
    x = 3,189.49

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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.