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Finding the Fourth Proportional to 8,651.53, 12,978.92 and 2,806.57

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Solution

The fourth proportional to 8,651.53, 12,978.92 and 2,806.57 is: 4,210.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.53 : 12,978.92 = 2,806.57 : x
  2. Step 2: Convert to fraction form
    8,651.53/12,978.92 = 2,806.57/x
  3. Step 3: Cross multiply
    8,651.53x = 12,978.92 × 2,806.57
  4. Step 4: Simplify right side
    8,651.53x = 36,426,247.50
  5. Step 5: Solve for x
    x = 36,426,247.50/8,651.53
  6. Step 6: Final answer
    x = 4,210.38

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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.