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Finding the Fourth Proportional to 18,243.87, 27,365.81 and 8,391.44

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Solution

The fourth proportional to 18,243.87, 27,365.81 and 8,391.44 is: 12,587.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.87 : 27,365.81 = 8,391.44 : x
  2. Step 2: Convert to fraction form
    18,243.87/27,365.81 = 8,391.44/x
  3. Step 3: Cross multiply
    18,243.87x = 27,365.81 × 8,391.44
  4. Step 4: Simplify right side
    18,243.87x = 229,638,373.88
  5. Step 5: Solve for x
    x = 229,638,373.88/18,243.87
  6. Step 6: Final answer
    x = 12,587.15

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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.