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Finding the Fourth Proportional to 20,018.88, 30,028.28 and 18,801

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Solution

The fourth proportional to 20,018.88, 30,028.28 and 18,801 is: 28,201.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.88 : 30,028.28 = 18,801 : x
  2. Step 2: Convert to fraction form
    20,018.88/30,028.28 = 18,801/x
  3. Step 3: Cross multiply
    20,018.88x = 30,028.28 × 18,801
  4. Step 4: Simplify right side
    20,018.88x = 564,561,598.28
  5. Step 5: Solve for x
    x = 564,561,598.28/20,018.88
  6. Step 6: Final answer
    x = 28,201.46

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.