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Finding the Fourth Proportional to 28,755.78, 43,133.42 and 7,979.28

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Solution

The fourth proportional to 28,755.78, 43,133.42 and 7,979.28 is: 11,968.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,755.78 : 43,133.42 = 7,979.28 : x
  2. Step 2: Convert to fraction form
    28,755.78/43,133.42 = 7,979.28/x
  3. Step 3: Cross multiply
    28,755.78x = 43,133.42 × 7,979.28
  4. Step 4: Simplify right side
    28,755.78x = 344,173,635.54
  5. Step 5: Solve for x
    x = 344,173,635.54/28,755.78
  6. Step 6: Final answer
    x = 11,968.85

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1.5x scale

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.