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Finding the Fourth Proportional to 8,622.70, 12,923.55 and 6,119.96

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Solution

The fourth proportional to 8,622.70, 12,923.55 and 6,119.96 is: 9,172.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.70 : 12,923.55 = 6,119.96 : x
  2. Step 2: Convert to fraction form
    8,622.70/12,923.55 = 6,119.96/x
  3. Step 3: Cross multiply
    8,622.70x = 12,923.55 × 6,119.96
  4. Step 4: Simplify right side
    8,622.70x = 79,091,544.44
  5. Step 5: Solve for x
    x = 79,091,544.44/8,622.70
  6. Step 6: Final answer
    x = 9,172.48

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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.