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Finding the Fourth Proportional to 21,286.56, 31,936.02 and 8,804.28

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Solution

The fourth proportional to 21,286.56, 31,936.02 and 8,804.28 is: 13,208.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.56 : 31,936.02 = 8,804.28 : x
  2. Step 2: Convert to fraction form
    21,286.56/31,936.02 = 8,804.28/x
  3. Step 3: Cross multiply
    21,286.56x = 31,936.02 × 8,804.28
  4. Step 4: Simplify right side
    21,286.56x = 281,173,662.17
  5. Step 5: Solve for x
    x = 281,173,662.17/21,286.56
  6. Step 6: Final answer
    x = 13,208.98

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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.