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Finding the Fourth Proportional to 8,651.07, 12,978.42 and 2,807.22

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Solution

The fourth proportional to 8,651.07, 12,978.42 and 2,807.22 is: 4,211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.07 : 12,978.42 = 2,807.22 : x
  2. Step 2: Convert to fraction form
    8,651.07/12,978.42 = 2,807.22/x
  3. Step 3: Cross multiply
    8,651.07x = 12,978.42 × 2,807.22
  4. Step 4: Simplify right side
    8,651.07x = 36,433,280.19
  5. Step 5: Solve for x
    x = 36,433,280.19/8,651.07
  6. Step 6: Final answer
    x = 4,211.42

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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.