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Finding the Fourth Proportional to 8,188.80, 12,285.60 and 2,643

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Solution

The fourth proportional to 8,188.80, 12,285.60 and 2,643 is: 3,965.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,188.80 : 12,285.60 = 2,643 : x
  2. Step 2: Convert to fraction form
    8,188.80/12,285.60 = 2,643/x
  3. Step 3: Cross multiply
    8,188.80x = 12,285.60 × 2,643
  4. Step 4: Simplify right side
    8,188.80x = 32,470,840.80
  5. Step 5: Solve for x
    x = 32,470,840.80/8,188.80
  6. Step 6: Final answer
    x = 3,965.27

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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.