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Finding the Fourth Proportional to 12,149.66, 18,218.28 and 7,992.02

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Solution

The fourth proportional to 12,149.66, 18,218.28 and 7,992.02 is: 11,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,149.66 : 18,218.28 = 7,992.02 : x
  2. Step 2: Convert to fraction form
    12,149.66/18,218.28 = 7,992.02/x
  3. Step 3: Cross multiply
    12,149.66x = 18,218.28 × 7,992.02
  4. Step 4: Simplify right side
    12,149.66x = 145,600,858.13
  5. Step 5: Solve for x
    x = 145,600,858.13/12,149.66
  6. Step 6: Final answer
    x = 11,983.95

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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.