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Finding the Fourth Proportional to 8,552.90, 12,831.78 and 4,172.78

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Solution

The fourth proportional to 8,552.90, 12,831.78 and 4,172.78 is: 6,260.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,552.90 : 12,831.78 = 4,172.78 : x
  2. Step 2: Convert to fraction form
    8,552.90/12,831.78 = 4,172.78/x
  3. Step 3: Cross multiply
    8,552.90x = 12,831.78 × 4,172.78
  4. Step 4: Simplify right side
    8,552.90x = 53,544,194.95
  5. Step 5: Solve for x
    x = 53,544,194.95/8,552.90
  6. Step 6: Final answer
    x = 6,260.36

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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.