Home / 6,620.31-9,135.27-3,930.57

Finding the Fourth Proportional to 6,620.31, 9,135.27 and 3,930.57

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Solution

The fourth proportional to 6,620.31, 9,135.27 and 3,930.57 is: 5,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.31 : 9,135.27 = 3,930.57 : x
  2. Step 2: Convert to fraction form
    6,620.31/9,135.27 = 3,930.57/x
  3. Step 3: Cross multiply
    6,620.31x = 9,135.27 × 3,930.57
  4. Step 4: Simplify right side
    6,620.31x = 35,906,818.20
  5. Step 5: Solve for x
    x = 35,906,818.20/6,620.31
  6. Step 6: Final answer
    x = 5,423.74

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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.