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Finding the Fourth Proportional to 18,399.30, 27,615.15 and 15,936.90

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Solution

The fourth proportional to 18,399.30, 27,615.15 and 15,936.90 is: 23,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.30 : 27,615.15 = 15,936.90 : x
  2. Step 2: Convert to fraction form
    18,399.30/27,615.15 = 15,936.90/x
  3. Step 3: Cross multiply
    18,399.30x = 27,615.15 × 15,936.90
  4. Step 4: Simplify right side
    18,399.30x = 440,099,884.04
  5. Step 5: Solve for x
    x = 440,099,884.04/18,399.30
  6. Step 6: Final answer
    x = 23,919.38

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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.