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Finding the Fourth Proportional to 18,981.92, 28,464.08 and 11,086.79

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Solution

The fourth proportional to 18,981.92, 28,464.08 and 11,086.79 is: 16,625.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.92 : 28,464.08 = 11,086.79 : x
  2. Step 2: Convert to fraction form
    18,981.92/28,464.08 = 11,086.79/x
  3. Step 3: Cross multiply
    18,981.92x = 28,464.08 × 11,086.79
  4. Step 4: Simplify right side
    18,981.92x = 315,575,079.75
  5. Step 5: Solve for x
    x = 315,575,079.75/18,981.92
  6. Step 6: Final answer
    x = 16,625.03

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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.