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Finding the Fourth Proportional to 21,958.54, 32,942.36 and 8,811.95

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Solution

The fourth proportional to 21,958.54, 32,942.36 and 8,811.95 is: 13,219.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.54 : 32,942.36 = 8,811.95 : x
  2. Step 2: Convert to fraction form
    21,958.54/32,942.36 = 8,811.95/x
  3. Step 3: Cross multiply
    21,958.54x = 32,942.36 × 8,811.95
  4. Step 4: Simplify right side
    21,958.54x = 290,286,286.52
  5. Step 5: Solve for x
    x = 290,286,286.52/21,958.54
  6. Step 6: Final answer
    x = 13,219.75

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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.