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Finding the Fourth Proportional to 8,406.65, 12,611.16 and 2,858.49

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Solution

The fourth proportional to 8,406.65, 12,611.16 and 2,858.49 is: 4,288.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,406.65 : 12,611.16 = 2,858.49 : x
  2. Step 2: Convert to fraction form
    8,406.65/12,611.16 = 2,858.49/x
  3. Step 3: Cross multiply
    8,406.65x = 12,611.16 × 2,858.49
  4. Step 4: Simplify right side
    8,406.65x = 36,048,874.75
  5. Step 5: Solve for x
    x = 36,048,874.75/8,406.65
  6. Step 6: Final answer
    x = 4,288.14

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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.