Home / 3,930.02-5,423.45-2,161.73

Finding the Fourth Proportional to 3,930.02, 5,423.45 and 2,161.73

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Solution

The fourth proportional to 3,930.02, 5,423.45 and 2,161.73 is: 2,983.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.02 : 5,423.45 = 2,161.73 : x
  2. Step 2: Convert to fraction form
    3,930.02/5,423.45 = 2,161.73/x
  3. Step 3: Cross multiply
    3,930.02x = 5,423.45 × 2,161.73
  4. Step 4: Simplify right side
    3,930.02x = 11,724,037.32
  5. Step 5: Solve for x
    x = 11,724,037.32/3,930.02
  6. Step 6: Final answer
    x = 2,983.20

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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.