Home / 3,121.80-4,295.16-2,371.38

Finding the Fourth Proportional to 3,121.80, 4,295.16 and 2,371.38

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Solution

The fourth proportional to 3,121.80, 4,295.16 and 2,371.38 is: 3,262.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.80 : 4,295.16 = 2,371.38 : x
  2. Step 2: Convert to fraction form
    3,121.80/4,295.16 = 2,371.38/x
  3. Step 3: Cross multiply
    3,121.80x = 4,295.16 × 2,371.38
  4. Step 4: Simplify right side
    3,121.80x = 10,185,456.52
  5. Step 5: Solve for x
    x = 10,185,456.52/3,121.80
  6. Step 6: Final answer
    x = 3,262.69

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Find fourth proportional to 1,560.90, 2,147.58 and 1,185.69
Half scale
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Double scale
Find fourth proportional to 3,122.80, 4,296.54 and 2,372.38
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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.