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Finding the Fourth Proportional to 11,893.39, 17,867.43 and 8,391.47

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Solution

The fourth proportional to 11,893.39, 17,867.43 and 8,391.47 is: 12,606.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,893.39 : 17,867.43 = 8,391.47 : x
  2. Step 2: Convert to fraction form
    11,893.39/17,867.43 = 8,391.47/x
  3. Step 3: Cross multiply
    11,893.39x = 17,867.43 × 8,391.47
  4. Step 4: Simplify right side
    11,893.39x = 149,933,913.48
  5. Step 5: Solve for x
    x = 149,933,913.48/11,893.39
  6. Step 6: Final answer
    x = 12,606.49

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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.