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Finding the Fourth Proportional to 18,843.99, 25,999.36 and 12,133.50

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Solution

The fourth proportional to 18,843.99, 25,999.36 and 12,133.50 is: 16,740.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.99 : 25,999.36 = 12,133.50 : x
  2. Step 2: Convert to fraction form
    18,843.99/25,999.36 = 12,133.50/x
  3. Step 3: Cross multiply
    18,843.99x = 25,999.36 × 12,133.50
  4. Step 4: Simplify right side
    18,843.99x = 315,463,234.56
  5. Step 5: Solve for x
    x = 315,463,234.56/18,843.99
  6. Step 6: Final answer
    x = 16,740.79

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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.