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Finding the Fourth Proportional to 25,086.90, 34,619.91 and 13,908.90

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Solution

The fourth proportional to 25,086.90, 34,619.91 and 13,908.90 is: 19,194.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,086.90 : 34,619.91 = 13,908.90 : x
  2. Step 2: Convert to fraction form
    25,086.90/34,619.91 = 13,908.90/x
  3. Step 3: Cross multiply
    25,086.90x = 34,619.91 × 13,908.90
  4. Step 4: Simplify right side
    25,086.90x = 481,524,866.20
  5. Step 5: Solve for x
    x = 481,524,866.20/25,086.90
  6. Step 6: Final answer
    x = 19,194.28

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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.