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Finding the Fourth Proportional to 8,579.60, 12,861.30 and 7,704.80

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Solution

The fourth proportional to 8,579.60, 12,861.30 and 7,704.80 is: 11,549.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.60 : 12,861.30 = 7,704.80 : x
  2. Step 2: Convert to fraction form
    8,579.60/12,861.30 = 7,704.80/x
  3. Step 3: Cross multiply
    8,579.60x = 12,861.30 × 7,704.80
  4. Step 4: Simplify right side
    8,579.60x = 99,093,744.24
  5. Step 5: Solve for x
    x = 99,093,744.24/8,579.60
  6. Step 6: Final answer
    x = 11,549.93

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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.