Home / 3,138.09-4,329.84-1,811.70

Finding the Fourth Proportional to 3,138.09, 4,329.84 and 1,811.70

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Solution

The fourth proportional to 3,138.09, 4,329.84 and 1,811.70 is: 2,499.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.09 : 4,329.84 = 1,811.70 : x
  2. Step 2: Convert to fraction form
    3,138.09/4,329.84 = 1,811.70/x
  3. Step 3: Cross multiply
    3,138.09x = 4,329.84 × 1,811.70
  4. Step 4: Simplify right side
    3,138.09x = 7,844,371.13
  5. Step 5: Solve for x
    x = 7,844,371.13/3,138.09
  6. Step 6: Final answer
    x = 2,499.73

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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.