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Finding the Fourth Proportional to 19,245.07, 28,845.19 and 8,148.07

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Solution

The fourth proportional to 19,245.07, 28,845.19 and 8,148.07 is: 12,212.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,245.07 : 28,845.19 = 8,148.07 : x
  2. Step 2: Convert to fraction form
    19,245.07/28,845.19 = 8,148.07/x
  3. Step 3: Cross multiply
    19,245.07x = 28,845.19 × 8,148.07
  4. Step 4: Simplify right side
    19,245.07x = 235,032,627.28
  5. Step 5: Solve for x
    x = 235,032,627.28/19,245.07
  6. Step 6: Final answer
    x = 12,212.61

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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.