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Finding the Fourth Proportional to 19,201.88, 28,814.15 and 8,107.85

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Solution

The fourth proportional to 19,201.88, 28,814.15 and 8,107.85 is: 12,166.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.88 : 28,814.15 = 8,107.85 : x
  2. Step 2: Convert to fraction form
    19,201.88/28,814.15 = 8,107.85/x
  3. Step 3: Cross multiply
    19,201.88x = 28,814.15 × 8,107.85
  4. Step 4: Simplify right side
    19,201.88x = 233,620,682.28
  5. Step 5: Solve for x
    x = 233,620,682.28/19,201.88
  6. Step 6: Final answer
    x = 12,166.56

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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.