Home / 3,138.12-4,328.37-1,958.76

Finding the Fourth Proportional to 3,138.12, 4,328.37 and 1,958.76

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Solution

The fourth proportional to 3,138.12, 4,328.37 and 1,958.76 is: 2,701.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.12 : 4,328.37 = 1,958.76 : x
  2. Step 2: Convert to fraction form
    3,138.12/4,328.37 = 1,958.76/x
  3. Step 3: Cross multiply
    3,138.12x = 4,328.37 × 1,958.76
  4. Step 4: Simplify right side
    3,138.12x = 8,478,238.02
  5. Step 5: Solve for x
    x = 8,478,238.02/3,138.12
  6. Step 6: Final answer
    x = 2,701.69

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Half scale
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Double scale
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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.