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Finding the Fourth Proportional to 28,665, 43,008.44 and 11,136.20

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Solution

The fourth proportional to 28,665, 43,008.44 and 11,136.20 is: 16,708.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,665 : 43,008.44 = 11,136.20 : x
  2. Step 2: Convert to fraction form
    28,665/43,008.44 = 11,136.20/x
  3. Step 3: Cross multiply
    28,665x = 43,008.44 × 11,136.20
  4. Step 4: Simplify right side
    28,665x = 478,950,318.80
  5. Step 5: Solve for x
    x = 478,950,318.80/28,665
  6. Step 6: Final answer
    x = 16,708.54

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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.