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Finding the Fourth Proportional to 18,512.52, 25,520.71 and 13,198.11

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Solution

The fourth proportional to 18,512.52, 25,520.71 and 13,198.11 is: 18,194.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.52 : 25,520.71 = 13,198.11 : x
  2. Step 2: Convert to fraction form
    18,512.52/25,520.71 = 13,198.11/x
  3. Step 3: Cross multiply
    18,512.52x = 25,520.71 × 13,198.11
  4. Step 4: Simplify right side
    18,512.52x = 336,825,137.86
  5. Step 5: Solve for x
    x = 336,825,137.86/18,512.52
  6. Step 6: Final answer
    x = 18,194.45

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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.