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Finding the Fourth Proportional to 18,729.78, 28,094.49 and 7,633.86

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Solution

The fourth proportional to 18,729.78, 28,094.49 and 7,633.86 is: 11,450.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729.78 : 28,094.49 = 7,633.86 : x
  2. Step 2: Convert to fraction form
    18,729.78/28,094.49 = 7,633.86/x
  3. Step 3: Cross multiply
    18,729.78x = 28,094.49 × 7,633.86
  4. Step 4: Simplify right side
    18,729.78x = 214,469,403.43
  5. Step 5: Solve for x
    x = 214,469,403.43/18,729.78
  6. Step 6: Final answer
    x = 11,450.72

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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.