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Finding the Fourth Proportional to 11,925.85, 17,891.66 and 8,422.68

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Solution

The fourth proportional to 11,925.85, 17,891.66 and 8,422.68 is: 12,636.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,925.85 : 17,891.66 = 8,422.68 : x
  2. Step 2: Convert to fraction form
    11,925.85/17,891.66 = 8,422.68/x
  3. Step 3: Cross multiply
    11,925.85x = 17,891.66 × 8,422.68
  4. Step 4: Simplify right side
    11,925.85x = 150,695,791.31
  5. Step 5: Solve for x
    x = 150,695,791.31/11,925.85
  6. Step 6: Final answer
    x = 12,636.07

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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.