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Finding the Fourth Proportional to 8,518.56, 12,772.05 and 4,355.18

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Solution

The fourth proportional to 8,518.56, 12,772.05 and 4,355.18 is: 6,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.56 : 12,772.05 = 4,355.18 : x
  2. Step 2: Convert to fraction form
    8,518.56/12,772.05 = 4,355.18/x
  3. Step 3: Cross multiply
    8,518.56x = 12,772.05 × 4,355.18
  4. Step 4: Simplify right side
    8,518.56x = 55,624,512.86
  5. Step 5: Solve for x
    x = 55,624,512.86/8,518.56
  6. Step 6: Final answer
    x = 6,529.80

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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.