Home / 3,930.22-5,423.16-3,135.52

Finding the Fourth Proportional to 3,930.22, 5,423.16 and 3,135.52

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Solution

The fourth proportional to 3,930.22, 5,423.16 and 3,135.52 is: 4,326.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.22 : 5,423.16 = 3,135.52 : x
  2. Step 2: Convert to fraction form
    3,930.22/5,423.16 = 3,135.52/x
  3. Step 3: Cross multiply
    3,930.22x = 5,423.16 × 3,135.52
  4. Step 4: Simplify right side
    3,930.22x = 17,004,426.64
  5. Step 5: Solve for x
    x = 17,004,426.64/3,930.22
  6. Step 6: Final answer
    x = 4,326.58

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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.