Home / 3,138.42-4,336.76-2,286.19

Finding the Fourth Proportional to 3,138.42, 4,336.76 and 2,286.19

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Solution

The fourth proportional to 3,138.42, 4,336.76 and 2,286.19 is: 3,159.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.42 : 4,336.76 = 2,286.19 : x
  2. Step 2: Convert to fraction form
    3,138.42/4,336.76 = 2,286.19/x
  3. Step 3: Cross multiply
    3,138.42x = 4,336.76 × 2,286.19
  4. Step 4: Simplify right side
    3,138.42x = 9,914,667.82
  5. Step 5: Solve for x
    x = 9,914,667.82/3,138.42
  6. Step 6: Final answer
    x = 3,159.12

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Half scale
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Double scale
Find fourth proportional to 3,139.42, 4,338.14 and 2,287.19
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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.