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Finding the Fourth Proportional to 18,753.84, 28,170.90 and 11,361.84

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Solution

The fourth proportional to 18,753.84, 28,170.90 and 11,361.84 is: 17,067.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.84 : 28,170.90 = 11,361.84 : x
  2. Step 2: Convert to fraction form
    18,753.84/28,170.90 = 11,361.84/x
  3. Step 3: Cross multiply
    18,753.84x = 28,170.90 × 11,361.84
  4. Step 4: Simplify right side
    18,753.84x = 320,073,258.46
  5. Step 5: Solve for x
    x = 320,073,258.46/18,753.84
  6. Step 6: Final answer
    x = 17,067.08

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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.