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Finding the Fourth Proportional to 14,799.20, 20,422.88 and 8,511.56

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Solution

The fourth proportional to 14,799.20, 20,422.88 and 8,511.56 is: 11,745.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,799.20 : 20,422.88 = 8,511.56 : x
  2. Step 2: Convert to fraction form
    14,799.20/20,422.88 = 8,511.56/x
  3. Step 3: Cross multiply
    14,799.20x = 20,422.88 × 8,511.56
  4. Step 4: Simplify right side
    14,799.20x = 173,830,568.49
  5. Step 5: Solve for x
    x = 173,830,568.49/14,799.20
  6. Step 6: Final answer
    x = 11,745.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.