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Finding the Fourth Proportional to 27,720.79, 41,610.79 and 11,933.64

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Solution

The fourth proportional to 27,720.79, 41,610.79 and 11,933.64 is: 17,913.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.79 : 41,610.79 = 11,933.64 : x
  2. Step 2: Convert to fraction form
    27,720.79/41,610.79 = 11,933.64/x
  3. Step 3: Cross multiply
    27,720.79x = 41,610.79 × 11,933.64
  4. Step 4: Simplify right side
    27,720.79x = 496,568,187.98
  5. Step 5: Solve for x
    x = 496,568,187.98/27,720.79
  6. Step 6: Final answer
    x = 17,913.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.