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Finding the Fourth Proportional to 18,832.85, 25,981.13 and 11,660.87

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Solution

The fourth proportional to 18,832.85, 25,981.13 and 11,660.87 is: 16,086.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,832.85 : 25,981.13 = 11,660.87 : x
  2. Step 2: Convert to fraction form
    18,832.85/25,981.13 = 11,660.87/x
  3. Step 3: Cross multiply
    18,832.85x = 25,981.13 × 11,660.87
  4. Step 4: Simplify right side
    18,832.85x = 302,962,391.17
  5. Step 5: Solve for x
    x = 302,962,391.17/18,832.85
  6. Step 6: Final answer
    x = 16,086.92

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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.