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Finding the Fourth Proportional to 28,693.98, 43,043.45 and 7,917.48

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Solution

The fourth proportional to 28,693.98, 43,043.45 and 7,917.48 is: 11,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,693.98 : 43,043.45 = 7,917.48 : x
  2. Step 2: Convert to fraction form
    28,693.98/43,043.45 = 7,917.48/x
  3. Step 3: Cross multiply
    28,693.98x = 43,043.45 × 7,917.48
  4. Step 4: Simplify right side
    28,693.98x = 340,795,614.92
  5. Step 5: Solve for x
    x = 340,795,614.92/28,693.98
  6. Step 6: Final answer
    x = 11,876.90

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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.