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Finding the Fourth Proportional to 18,832.86, 25,981.12 and 11,660.86

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Solution

The fourth proportional to 18,832.86, 25,981.12 and 11,660.86 is: 16,086.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,832.86 : 25,981.12 = 11,660.86 : x
  2. Step 2: Convert to fraction form
    18,832.86/25,981.12 = 11,660.86/x
  3. Step 3: Cross multiply
    18,832.86x = 25,981.12 × 11,660.86
  4. Step 4: Simplify right side
    18,832.86x = 302,962,202.96
  5. Step 5: Solve for x
    x = 302,962,202.96/18,832.86
  6. Step 6: Final answer
    x = 16,086.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.