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Finding the Fourth Proportional to 8,652.17, 12,980.25 and 2,808.78

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Solution

The fourth proportional to 8,652.17, 12,980.25 and 2,808.78 is: 4,213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.17 : 12,980.25 = 2,808.78 : x
  2. Step 2: Convert to fraction form
    8,652.17/12,980.25 = 2,808.78/x
  3. Step 3: Cross multiply
    8,652.17x = 12,980.25 × 2,808.78
  4. Step 4: Simplify right side
    8,652.17x = 36,458,617.92
  5. Step 5: Solve for x
    x = 36,458,617.92/8,652.17
  6. Step 6: Final answer
    x = 4,213.81

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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.