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Finding the Fourth Proportional to 8,671.35, 13,007.39 and 7,220.73

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Solution

The fourth proportional to 8,671.35, 13,007.39 and 7,220.73 is: 10,831.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.35 : 13,007.39 = 7,220.73 : x
  2. Step 2: Convert to fraction form
    8,671.35/13,007.39 = 7,220.73/x
  3. Step 3: Cross multiply
    8,671.35x = 13,007.39 × 7,220.73
  4. Step 4: Simplify right side
    8,671.35x = 93,922,815.09
  5. Step 5: Solve for x
    x = 93,922,815.09/8,671.35
  6. Step 6: Final answer
    x = 10,831.39

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1.5x scale

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.