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Finding the Fourth Proportional to 18,391.75, 27,587.72 and 4,540.75

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Solution

The fourth proportional to 18,391.75, 27,587.72 and 4,540.75 is: 6,811.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.75 : 27,587.72 = 4,540.75 : x
  2. Step 2: Convert to fraction form
    18,391.75/27,587.72 = 4,540.75/x
  3. Step 3: Cross multiply
    18,391.75x = 27,587.72 × 4,540.75
  4. Step 4: Simplify right side
    18,391.75x = 125,268,916.89
  5. Step 5: Solve for x
    x = 125,268,916.89/18,391.75
  6. Step 6: Final answer
    x = 6,811.15

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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.