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Finding the Fourth Proportional to 21,658.78, 32,496.48 and 7,620.27

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Solution

The fourth proportional to 21,658.78, 32,496.48 and 7,620.27 is: 11,433.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.78 : 32,496.48 = 7,620.27 : x
  2. Step 2: Convert to fraction form
    21,658.78/32,496.48 = 7,620.27/x
  3. Step 3: Cross multiply
    21,658.78x = 32,496.48 × 7,620.27
  4. Step 4: Simplify right side
    21,658.78x = 247,631,951.65
  5. Step 5: Solve for x
    x = 247,631,951.65/21,658.78
  6. Step 6: Final answer
    x = 11,433.33

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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.