Home / 18,399.30-25,395.92-11,331.65

Finding the Fourth Proportional to 18,399.30, 25,395.92 and 11,331.65

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Solution

The fourth proportional to 18,399.30, 25,395.92 and 11,331.65 is: 15,640.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.30 : 25,395.92 = 11,331.65 : x
  2. Step 2: Convert to fraction form
    18,399.30/25,395.92 = 11,331.65/x
  3. Step 3: Cross multiply
    18,399.30x = 25,395.92 × 11,331.65
  4. Step 4: Simplify right side
    18,399.30x = 287,777,493.23
  5. Step 5: Solve for x
    x = 287,777,493.23/18,399.30
  6. Step 6: Final answer
    x = 15,640.68

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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.