Home / 11,983.55-17,981.39-8,079.75

Finding the Fourth Proportional to 11,983.55, 17,981.39 and 8,079.75

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Solution

The fourth proportional to 11,983.55, 17,981.39 and 8,079.75 is: 12,123.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,983.55 : 17,981.39 = 8,079.75 : x
  2. Step 2: Convert to fraction form
    11,983.55/17,981.39 = 8,079.75/x
  3. Step 3: Cross multiply
    11,983.55x = 17,981.39 × 8,079.75
  4. Step 4: Simplify right side
    11,983.55x = 145,285,156.05
  5. Step 5: Solve for x
    x = 145,285,156.05/11,983.55
  6. Step 6: Final answer
    x = 12,123.72

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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.