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Finding the Fourth Proportional to 28,751, 43,126.50 and 7,974.50

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Solution

The fourth proportional to 28,751, 43,126.50 and 7,974.50 is: 11,961.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,751 : 43,126.50 = 7,974.50 : x
  2. Step 2: Convert to fraction form
    28,751/43,126.50 = 7,974.50/x
  3. Step 3: Cross multiply
    28,751x = 43,126.50 × 7,974.50
  4. Step 4: Simplify right side
    28,751x = 343,912,274.25
  5. Step 5: Solve for x
    x = 343,912,274.25/28,751
  6. Step 6: Final answer
    x = 11,961.75

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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.