Home / 3,930.24-5,423.68-2,161.84

Finding the Fourth Proportional to 3,930.24, 5,423.68 and 2,161.84

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Solution

The fourth proportional to 3,930.24, 5,423.68 and 2,161.84 is: 2,983.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.24 : 5,423.68 = 2,161.84 : x
  2. Step 2: Convert to fraction form
    3,930.24/5,423.68 = 2,161.84/x
  3. Step 3: Cross multiply
    3,930.24x = 5,423.68 × 2,161.84
  4. Step 4: Simplify right side
    3,930.24x = 11,725,128.37
  5. Step 5: Solve for x
    x = 11,725,128.37/3,930.24
  6. Step 6: Final answer
    x = 2,983.31

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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.