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Finding the Fourth Proportional to 18,689.94, 27,977.67 and 12,103.02

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Solution

The fourth proportional to 18,689.94, 27,977.67 and 12,103.02 is: 18,117.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.94 : 27,977.67 = 12,103.02 : x
  2. Step 2: Convert to fraction form
    18,689.94/27,977.67 = 12,103.02/x
  3. Step 3: Cross multiply
    18,689.94x = 27,977.67 × 12,103.02
  4. Step 4: Simplify right side
    18,689.94x = 338,614,299.56
  5. Step 5: Solve for x
    x = 338,614,299.56/18,689.94
  6. Step 6: Final answer
    x = 18,117.46

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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.