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Finding the Fourth Proportional to 18,391.91, 27,587.86 and 4,540.91

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Solution

The fourth proportional to 18,391.91, 27,587.86 and 4,540.91 is: 6,811.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.91 : 27,587.86 = 4,540.91 : x
  2. Step 2: Convert to fraction form
    18,391.91/27,587.86 = 4,540.91/x
  3. Step 3: Cross multiply
    18,391.91x = 27,587.86 × 4,540.91
  4. Step 4: Simplify right side
    18,391.91x = 125,273,840.06
  5. Step 5: Solve for x
    x = 125,273,840.06/18,391.91
  6. Step 6: Final answer
    x = 6,811.36

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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.