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Finding the Fourth Proportional to 18,151.70, 27,191.10 and 12,246.80

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Solution

The fourth proportional to 18,151.70, 27,191.10 and 12,246.80 is: 18,345.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.70 : 27,191.10 = 12,246.80 : x
  2. Step 2: Convert to fraction form
    18,151.70/27,191.10 = 12,246.80/x
  3. Step 3: Cross multiply
    18,151.70x = 27,191.10 × 12,246.80
  4. Step 4: Simplify right side
    18,151.70x = 333,003,963.48
  5. Step 5: Solve for x
    x = 333,003,963.48/18,151.70
  6. Step 6: Final answer
    x = 18,345.61

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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.