Home / 3,889.80-5,370.30-2,399.73

Finding the Fourth Proportional to 3,889.80, 5,370.30 and 2,399.73

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Solution

The fourth proportional to 3,889.80, 5,370.30 and 2,399.73 is: 3,313.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,370.30 = 2,399.73 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,370.30 = 2,399.73/x
  3. Step 3: Cross multiply
    3,889.80x = 5,370.30 × 2,399.73
  4. Step 4: Simplify right side
    3,889.80x = 12,887,270.02
  5. Step 5: Solve for x
    x = 12,887,270.02/3,889.80
  6. Step 6: Final answer
    x = 3,313.09

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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.