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Finding the Fourth Proportional to 18,450, 25,488.72 and 12,091.68

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Solution

The fourth proportional to 18,450, 25,488.72 and 12,091.68 is: 16,704.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,450 : 25,488.72 = 12,091.68 : x
  2. Step 2: Convert to fraction form
    18,450/25,488.72 = 12,091.68/x
  3. Step 3: Cross multiply
    18,450x = 25,488.72 × 12,091.68
  4. Step 4: Simplify right side
    18,450x = 308,201,445.85
  5. Step 5: Solve for x
    x = 308,201,445.85/18,450
  6. Step 6: Final answer
    x = 16,704.69

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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.