Home / 2,163.00-2,986.38-1,279.09

Finding the Fourth Proportional to 2,163.00, 2,986.38 and 1,279.09

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Solution

The fourth proportional to 2,163.00, 2,986.38 and 1,279.09 is: 1,765.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.00 : 2,986.38 = 1,279.09 : x
  2. Step 2: Convert to fraction form
    2,163.00/2,986.38 = 1,279.09/x
  3. Step 3: Cross multiply
    2,163.00x = 2,986.38 × 1,279.09
  4. Step 4: Simplify right side
    2,163.00x = 3,819,835.73
  5. Step 5: Solve for x
    x = 3,819,835.73/2,163.00
  6. Step 6: Final answer
    x = 1,765.99

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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.