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Finding the Fourth Proportional to 15,093.26, 20,828.60 and 8,379.86

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Solution

The fourth proportional to 15,093.26, 20,828.60 and 8,379.86 is: 11,564.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,093.26 : 20,828.60 = 8,379.86 : x
  2. Step 2: Convert to fraction form
    15,093.26/20,828.60 = 8,379.86/x
  3. Step 3: Cross multiply
    15,093.26x = 20,828.60 × 8,379.86
  4. Step 4: Simplify right side
    15,093.26x = 174,540,752.00
  5. Step 5: Solve for x
    x = 174,540,752.00/15,093.26
  6. Step 6: Final answer
    x = 11,564.15

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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.