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Finding the Fourth Proportional to 8,648.78, 12,975.21 and 3,718.44

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Solution

The fourth proportional to 8,648.78, 12,975.21 and 3,718.44 is: 5,578.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,648.78 : 12,975.21 = 3,718.44 : x
  2. Step 2: Convert to fraction form
    8,648.78/12,975.21 = 3,718.44/x
  3. Step 3: Cross multiply
    8,648.78x = 12,975.21 × 3,718.44
  4. Step 4: Simplify right side
    8,648.78x = 48,247,539.87
  5. Step 5: Solve for x
    x = 48,247,539.87/8,648.78
  6. Step 6: Final answer
    x = 5,578.54

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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.