Home / 3,138.75-4,331.48-2,393.55

Finding the Fourth Proportional to 3,138.75, 4,331.48 and 2,393.55

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Solution

The fourth proportional to 3,138.75, 4,331.48 and 2,393.55 is: 3,303.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.75 : 4,331.48 = 2,393.55 : x
  2. Step 2: Convert to fraction form
    3,138.75/4,331.48 = 2,393.55/x
  3. Step 3: Cross multiply
    3,138.75x = 4,331.48 × 2,393.55
  4. Step 4: Simplify right side
    3,138.75x = 10,367,601.99
  5. Step 5: Solve for x
    x = 10,367,601.99/3,138.75
  6. Step 6: Final answer
    x = 3,303.10

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Half scale
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Double scale
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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.