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Finding the Fourth Proportional to 20,599.11, 30,891.35 and 8,905.95

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Solution

The fourth proportional to 20,599.11, 30,891.35 and 8,905.95 is: 13,355.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.11 : 30,891.35 = 8,905.95 : x
  2. Step 2: Convert to fraction form
    20,599.11/30,891.35 = 8,905.95/x
  3. Step 3: Cross multiply
    20,599.11x = 30,891.35 × 8,905.95
  4. Step 4: Simplify right side
    20,599.11x = 275,116,840.80
  5. Step 5: Solve for x
    x = 275,116,840.80/20,599.11
  6. Step 6: Final answer
    x = 13,355.76

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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.