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Finding the Fourth Proportional to 18,138.52, 25,029.79 and 10,179.21

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Solution

The fourth proportional to 18,138.52, 25,029.79 and 10,179.21 is: 14,046.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.52 : 25,029.79 = 10,179.21 : x
  2. Step 2: Convert to fraction form
    18,138.52/25,029.79 = 10,179.21/x
  3. Step 3: Cross multiply
    18,138.52x = 25,029.79 × 10,179.21
  4. Step 4: Simplify right side
    18,138.52x = 254,783,522.47
  5. Step 5: Solve for x
    x = 254,783,522.47/18,138.52
  6. Step 6: Final answer
    x = 14,046.54

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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.