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Finding the Fourth Proportional to 17,129.80, 25,670.70 and 13,625.80

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Solution

The fourth proportional to 17,129.80, 25,670.70 and 13,625.80 is: 20,419.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,129.80 : 25,670.70 = 13,625.80 : x
  2. Step 2: Convert to fraction form
    17,129.80/25,670.70 = 13,625.80/x
  3. Step 3: Cross multiply
    17,129.80x = 25,670.70 × 13,625.80
  4. Step 4: Simplify right side
    17,129.80x = 349,783,824.06
  5. Step 5: Solve for x
    x = 349,783,824.06/17,129.80
  6. Step 6: Final answer
    x = 20,419.61

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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.