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Finding the Fourth Proportional to 18,119.61, 27,187.07 and 7,591.65

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Solution

The fourth proportional to 18,119.61, 27,187.07 and 7,591.65 is: 11,390.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,119.61 : 27,187.07 = 7,591.65 : x
  2. Step 2: Convert to fraction form
    18,119.61/27,187.07 = 7,591.65/x
  3. Step 3: Cross multiply
    18,119.61x = 27,187.07 × 7,591.65
  4. Step 4: Simplify right side
    18,119.61x = 206,394,682.01
  5. Step 5: Solve for x
    x = 206,394,682.01/18,119.61
  6. Step 6: Final answer
    x = 11,390.68

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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.