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Finding the Fourth Proportional to 15,003.25, 20,704.49 and 8,379.25

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Solution

The fourth proportional to 15,003.25, 20,704.49 and 8,379.25 is: 11,563.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.25 : 20,704.49 = 8,379.25 : x
  2. Step 2: Convert to fraction form
    15,003.25/20,704.49 = 8,379.25/x
  3. Step 3: Cross multiply
    15,003.25x = 20,704.49 × 8,379.25
  4. Step 4: Simplify right side
    15,003.25x = 173,488,055.94
  5. Step 5: Solve for x
    x = 173,488,055.94/15,003.25
  6. Step 6: Final answer
    x = 11,563.37

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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.