Home / 3,138.12-4,331.63-1,959.19

Finding the Fourth Proportional to 3,138.12, 4,331.63 and 1,959.19

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Solution

The fourth proportional to 3,138.12, 4,331.63 and 1,959.19 is: 2,704.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.12 : 4,331.63 = 1,959.19 : x
  2. Step 2: Convert to fraction form
    3,138.12/4,331.63 = 1,959.19/x
  3. Step 3: Cross multiply
    3,138.12x = 4,331.63 × 1,959.19
  4. Step 4: Simplify right side
    3,138.12x = 8,486,469.23
  5. Step 5: Solve for x
    x = 8,486,469.23/3,138.12
  6. Step 6: Final answer
    x = 2,704.32

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Half scale
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Double scale
Find fourth proportional to 3,139.12, 4,333.01 and 1,960.19
Similar ratio
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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.