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Finding the Fourth Proportional to 8,568.84, 12,855 and 3,638.46

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Solution

The fourth proportional to 8,568.84, 12,855 and 3,638.46 is: 5,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,568.84 : 12,855 = 3,638.46 : x
  2. Step 2: Convert to fraction form
    8,568.84/12,855 = 3,638.46/x
  3. Step 3: Cross multiply
    8,568.84x = 12,855 × 3,638.46
  4. Step 4: Simplify right side
    8,568.84x = 46,772,403.30
  5. Step 5: Solve for x
    x = 46,772,403.30/8,568.84
  6. Step 6: Final answer
    x = 5,458.43

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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.