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Finding the Fourth Proportional to 18,391.86, 27,581.72 and 5,908.90

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Solution

The fourth proportional to 18,391.86, 27,581.72 and 5,908.90 is: 8,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.86 : 27,581.72 = 5,908.90 : x
  2. Step 2: Convert to fraction form
    18,391.86/27,581.72 = 5,908.90/x
  3. Step 3: Cross multiply
    18,391.86x = 27,581.72 × 5,908.90
  4. Step 4: Simplify right side
    18,391.86x = 162,977,578.52
  5. Step 5: Solve for x
    x = 162,977,578.52/18,391.86
  6. Step 6: Final answer
    x = 8,861.40

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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.