Home / 3,989.10-5,504.28-2,220.39

Finding the Fourth Proportional to 3,989.10, 5,504.28 and 2,220.39

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Solution

The fourth proportional to 3,989.10, 5,504.28 and 2,220.39 is: 3,063.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.10 : 5,504.28 = 2,220.39 : x
  2. Step 2: Convert to fraction form
    3,989.10/5,504.28 = 2,220.39/x
  3. Step 3: Cross multiply
    3,989.10x = 5,504.28 × 2,220.39
  4. Step 4: Simplify right side
    3,989.10x = 12,221,648.27
  5. Step 5: Solve for x
    x = 12,221,648.27/3,989.10
  6. Step 6: Final answer
    x = 3,063.76

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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.