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Finding the Fourth Proportional to 8,551.10, 12,828 and 3,620.76

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Solution

The fourth proportional to 8,551.10, 12,828 and 3,620.76 is: 5,431.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.10 : 12,828 = 3,620.76 : x
  2. Step 2: Convert to fraction form
    8,551.10/12,828 = 3,620.76/x
  3. Step 3: Cross multiply
    8,551.10x = 12,828 × 3,620.76
  4. Step 4: Simplify right side
    8,551.10x = 46,447,109.28
  5. Step 5: Solve for x
    x = 46,447,109.28/8,551.10
  6. Step 6: Final answer
    x = 5,431.71

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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.