Home / 2,112.12-3,169.80-1,383.12

Finding the Fourth Proportional to 2,112.12, 3,169.80 and 1,383.12

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Solution

The fourth proportional to 2,112.12, 3,169.80 and 1,383.12 is: 2,075.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.12 : 3,169.80 = 1,383.12 : x
  2. Step 2: Convert to fraction form
    2,112.12/3,169.80 = 1,383.12/x
  3. Step 3: Cross multiply
    2,112.12x = 3,169.80 × 1,383.12
  4. Step 4: Simplify right side
    2,112.12x = 4,384,213.78
  5. Step 5: Solve for x
    x = 4,384,213.78/2,112.12
  6. Step 6: Final answer
    x = 2,075.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.