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Finding the Fourth Proportional to 18,702.54, 25,800.82 and 11,144.64

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Solution

The fourth proportional to 18,702.54, 25,800.82 and 11,144.64 is: 15,374.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.54 : 25,800.82 = 11,144.64 : x
  2. Step 2: Convert to fraction form
    18,702.54/25,800.82 = 11,144.64/x
  3. Step 3: Cross multiply
    18,702.54x = 25,800.82 × 11,144.64
  4. Step 4: Simplify right side
    18,702.54x = 287,540,850.60
  5. Step 5: Solve for x
    x = 287,540,850.60/18,702.54
  6. Step 6: Final answer
    x = 15,374.43

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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.