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Finding the Fourth Proportional to 28,694.72, 43,044.56 and 7,918.22

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Solution

The fourth proportional to 28,694.72, 43,044.56 and 7,918.22 is: 11,878.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,694.72 : 43,044.56 = 7,918.22 : x
  2. Step 2: Convert to fraction form
    28,694.72/43,044.56 = 7,918.22/x
  3. Step 3: Cross multiply
    28,694.72x = 43,044.56 × 7,918.22
  4. Step 4: Simplify right side
    28,694.72x = 340,836,041.07
  5. Step 5: Solve for x
    x = 340,836,041.07/28,694.72
  6. Step 6: Final answer
    x = 11,878.01

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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.