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Finding the Fourth Proportional to 18,336.97, 27,421.41 and 13,660.21

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Solution

The fourth proportional to 18,336.97, 27,421.41 and 13,660.21 is: 20,427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,336.97 : 27,421.41 = 13,660.21 : x
  2. Step 2: Convert to fraction form
    18,336.97/27,421.41 = 13,660.21/x
  3. Step 3: Cross multiply
    18,336.97x = 27,421.41 × 13,660.21
  4. Step 4: Simplify right side
    18,336.97x = 374,582,219.10
  5. Step 5: Solve for x
    x = 374,582,219.10/18,336.97
  6. Step 6: Final answer
    x = 20,427.71

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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.