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Finding the Fourth Proportional to 18,798.92, 25,942.76 and 12,086.75

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Solution

The fourth proportional to 18,798.92, 25,942.76 and 12,086.75 is: 16,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.92 : 25,942.76 = 12,086.75 : x
  2. Step 2: Convert to fraction form
    18,798.92/25,942.76 = 12,086.75/x
  3. Step 3: Cross multiply
    18,798.92x = 25,942.76 × 12,086.75
  4. Step 4: Simplify right side
    18,798.92x = 313,563,464.28
  5. Step 5: Solve for x
    x = 313,563,464.28/18,798.92
  6. Step 6: Final answer
    x = 16,679.87

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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.