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Finding the Fourth Proportional to 17,100.47, 25,659.59 and 12,939.23

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Solution

The fourth proportional to 17,100.47, 25,659.59 and 12,939.23 is: 19,415.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,100.47 : 25,659.59 = 12,939.23 : x
  2. Step 2: Convert to fraction form
    17,100.47/25,659.59 = 12,939.23/x
  3. Step 3: Cross multiply
    17,100.47x = 25,659.59 × 12,939.23
  4. Step 4: Simplify right side
    17,100.47x = 332,015,336.17
  5. Step 5: Solve for x
    x = 332,015,336.17/17,100.47
  6. Step 6: Final answer
    x = 19,415.57

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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.