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Finding the Fourth Proportional to 28,715.44, 43,073.97 and 7,938.94

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Solution

The fourth proportional to 28,715.44, 43,073.97 and 7,938.94 is: 11,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.44 : 43,073.97 = 7,938.94 : x
  2. Step 2: Convert to fraction form
    28,715.44/43,073.97 = 7,938.94/x
  3. Step 3: Cross multiply
    28,715.44x = 43,073.97 × 7,938.94
  4. Step 4: Simplify right side
    28,715.44x = 341,961,408.33
  5. Step 5: Solve for x
    x = 341,961,408.33/28,715.44
  6. Step 6: Final answer
    x = 11,908.63

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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.