Home / 3,930.07-5,423.60-2,161.73

Finding the Fourth Proportional to 3,930.07, 5,423.60 and 2,161.73

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Solution

The fourth proportional to 3,930.07, 5,423.60 and 2,161.73 is: 2,983.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.07 : 5,423.60 = 2,161.73 : x
  2. Step 2: Convert to fraction form
    3,930.07/5,423.60 = 2,161.73/x
  3. Step 3: Cross multiply
    3,930.07x = 5,423.60 × 2,161.73
  4. Step 4: Simplify right side
    3,930.07x = 11,724,358.83
  5. Step 5: Solve for x
    x = 11,724,358.83/3,930.07
  6. Step 6: Final answer
    x = 2,983.24

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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.