Home / 6,619.92-9,134.71-3,930.18

Finding the Fourth Proportional to 6,619.92, 9,134.71 and 3,930.18

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Solution

The fourth proportional to 6,619.92, 9,134.71 and 3,930.18 is: 5,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,619.92 : 9,134.71 = 3,930.18 : x
  2. Step 2: Convert to fraction form
    6,619.92/9,134.71 = 3,930.18/x
  3. Step 3: Cross multiply
    6,619.92x = 9,134.71 × 3,930.18
  4. Step 4: Simplify right side
    6,619.92x = 35,901,054.55
  5. Step 5: Solve for x
    x = 35,901,054.55/6,619.92
  6. Step 6: Final answer
    x = 5,423.19

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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.