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Finding the Fourth Proportional to 8,661.74, 12,993.97 and 2,816.98

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Solution

The fourth proportional to 8,661.74, 12,993.97 and 2,816.98 is: 4,225.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.74 : 12,993.97 = 2,816.98 : x
  2. Step 2: Convert to fraction form
    8,661.74/12,993.97 = 2,816.98/x
  3. Step 3: Cross multiply
    8,661.74x = 12,993.97 × 2,816.98
  4. Step 4: Simplify right side
    8,661.74x = 36,603,746.57
  5. Step 5: Solve for x
    x = 36,603,746.57/8,661.74
  6. Step 6: Final answer
    x = 4,225.91

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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.