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Finding the Fourth Proportional to 18,108.90, 27,151.20 and 8,243.10

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Solution

The fourth proportional to 18,108.90, 27,151.20 and 8,243.10 is: 12,359.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,108.90 : 27,151.20 = 8,243.10 : x
  2. Step 2: Convert to fraction form
    18,108.90/27,151.20 = 8,243.10/x
  3. Step 3: Cross multiply
    18,108.90x = 27,151.20 × 8,243.10
  4. Step 4: Simplify right side
    18,108.90x = 223,810,056.72
  5. Step 5: Solve for x
    x = 223,810,056.72/18,108.90
  6. Step 6: Final answer
    x = 12,359.12

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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.