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Finding the Fourth Proportional to 18,696.21, 28,045.94 and 5,369.28

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Solution

The fourth proportional to 18,696.21, 28,045.94 and 5,369.28 is: 8,054.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.21 : 28,045.94 = 5,369.28 : x
  2. Step 2: Convert to fraction form
    18,696.21/28,045.94 = 5,369.28/x
  3. Step 3: Cross multiply
    18,696.21x = 28,045.94 × 5,369.28
  4. Step 4: Simplify right side
    18,696.21x = 150,586,477.88
  5. Step 5: Solve for x
    x = 150,586,477.88/18,696.21
  6. Step 6: Final answer
    x = 8,054.39

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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.