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Finding the Fourth Proportional to 8,662.41, 12,991.32 and 2,817.72

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Solution

The fourth proportional to 8,662.41, 12,991.32 and 2,817.72 is: 4,225.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.41 : 12,991.32 = 2,817.72 : x
  2. Step 2: Convert to fraction form
    8,662.41/12,991.32 = 2,817.72/x
  3. Step 3: Cross multiply
    8,662.41x = 12,991.32 × 2,817.72
  4. Step 4: Simplify right side
    8,662.41x = 36,605,902.19
  5. Step 5: Solve for x
    x = 36,605,902.19/8,662.41
  6. Step 6: Final answer
    x = 4,225.83

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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.