Home / 3,989.30-5,505.11-2,220.82

Finding the Fourth Proportional to 3,989.30, 5,505.11 and 2,220.82

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Solution

The fourth proportional to 3,989.30, 5,505.11 and 2,220.82 is: 3,064.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.30 : 5,505.11 = 2,220.82 : x
  2. Step 2: Convert to fraction form
    3,989.30/5,505.11 = 2,220.82/x
  3. Step 3: Cross multiply
    3,989.30x = 5,505.11 × 2,220.82
  4. Step 4: Simplify right side
    3,989.30x = 12,225,819.76
  5. Step 5: Solve for x
    x = 12,225,819.76/3,989.30
  6. Step 6: Final answer
    x = 3,064.65

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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.