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Finding the Fourth Proportional to 18,410.78, 27,609.78 and 17,229.80

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Solution

The fourth proportional to 18,410.78, 27,609.78 and 17,229.80 is: 25,838.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,410.78 : 27,609.78 = 17,229.80 : x
  2. Step 2: Convert to fraction form
    18,410.78/27,609.78 = 17,229.80/x
  3. Step 3: Cross multiply
    18,410.78x = 27,609.78 × 17,229.80
  4. Step 4: Simplify right side
    18,410.78x = 475,710,987.44
  5. Step 5: Solve for x
    x = 475,710,987.44/18,410.78
  6. Step 6: Final answer
    x = 25,838.72

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1.5x scale

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.