Home / 2,109.20-3,163.80-1,013.30

Finding the Fourth Proportional to 2,109.20, 3,163.80 and 1,013.30

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Solution

The fourth proportional to 2,109.20, 3,163.80 and 1,013.30 is: 1,519.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.20 : 3,163.80 = 1,013.30 : x
  2. Step 2: Convert to fraction form
    2,109.20/3,163.80 = 1,013.30/x
  3. Step 3: Cross multiply
    2,109.20x = 3,163.80 × 1,013.30
  4. Step 4: Simplify right side
    2,109.20x = 3,205,878.54
  5. Step 5: Solve for x
    x = 3,205,878.54/2,109.20
  6. Step 6: Final answer
    x = 1,519.95

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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.