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Finding the Fourth Proportional to 28,628.44, 42,943.87 and 7,851.94

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Solution

The fourth proportional to 28,628.44, 42,943.87 and 7,851.94 is: 11,778.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.44 : 42,943.87 = 7,851.94 : x
  2. Step 2: Convert to fraction form
    28,628.44/42,943.87 = 7,851.94/x
  3. Step 3: Cross multiply
    28,628.44x = 42,943.87 × 7,851.94
  4. Step 4: Simplify right side
    28,628.44x = 337,192,593.06
  5. Step 5: Solve for x
    x = 337,192,593.06/28,628.44
  6. Step 6: Final answer
    x = 11,778.24

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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.