Home / 18,739.20-25,866-11,191.12

Finding the Fourth Proportional to 18,739.20, 25,866 and 11,191.12

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Solution

The fourth proportional to 18,739.20, 25,866 and 11,191.12 is: 15,447.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.20 : 25,866 = 11,191.12 : x
  2. Step 2: Convert to fraction form
    18,739.20/25,866 = 11,191.12/x
  3. Step 3: Cross multiply
    18,739.20x = 25,866 × 11,191.12
  4. Step 4: Simplify right side
    18,739.20x = 289,469,509.92
  5. Step 5: Solve for x
    x = 289,469,509.92/18,739.20
  6. Step 6: Final answer
    x = 15,447.27

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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.