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Finding the Fourth Proportional to 21,946.40, 32,912.40 and 8,093.60

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Solution

The fourth proportional to 21,946.40, 32,912.40 and 8,093.60 is: 12,137.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,946.40 : 32,912.40 = 8,093.60 : x
  2. Step 2: Convert to fraction form
    21,946.40/32,912.40 = 8,093.60/x
  3. Step 3: Cross multiply
    21,946.40x = 32,912.40 × 8,093.60
  4. Step 4: Simplify right side
    21,946.40x = 266,379,800.64
  5. Step 5: Solve for x
    x = 266,379,800.64/21,946.40
  6. Step 6: Final answer
    x = 12,137.74

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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.