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Finding the Fourth Proportional to 18,687.94, 27,974.67 and 12,101.02

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Solution

The fourth proportional to 18,687.94, 27,974.67 and 12,101.02 is: 18,114.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.94 : 27,974.67 = 12,101.02 : x
  2. Step 2: Convert to fraction form
    18,687.94/27,974.67 = 12,101.02/x
  3. Step 3: Cross multiply
    18,687.94x = 27,974.67 × 12,101.02
  4. Step 4: Simplify right side
    18,687.94x = 338,522,041.16
  5. Step 5: Solve for x
    x = 338,522,041.16/18,687.94
  6. Step 6: Final answer
    x = 18,114.47

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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.