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Finding the Fourth Proportional to 18,806.41, 25,944.49 and 12,090.79

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Solution

The fourth proportional to 18,806.41, 25,944.49 and 12,090.79 is: 16,679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.41 : 25,944.49 = 12,090.79 : x
  2. Step 2: Convert to fraction form
    18,806.41/25,944.49 = 12,090.79/x
  3. Step 3: Cross multiply
    18,806.41x = 25,944.49 × 12,090.79
  4. Step 4: Simplify right side
    18,806.41x = 313,689,380.25
  5. Step 5: Solve for x
    x = 313,689,380.25/18,806.41
  6. Step 6: Final answer
    x = 16,679.92

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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.