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Finding the Fourth Proportional to 13,791.99, 19,040.01 and 8,489.88

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Solution

The fourth proportional to 13,791.99, 19,040.01 and 8,489.88 is: 11,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.99 : 19,040.01 = 8,489.88 : x
  2. Step 2: Convert to fraction form
    13,791.99/19,040.01 = 8,489.88/x
  3. Step 3: Cross multiply
    13,791.99x = 19,040.01 × 8,489.88
  4. Step 4: Simplify right side
    13,791.99x = 161,647,400.10
  5. Step 5: Solve for x
    x = 161,647,400.10/13,791.99
  6. Step 6: Final answer
    x = 11,720.38

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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.