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Finding the Fourth Proportional to 7,626.60, 11,415.60 and 5,439.60

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Solution

The fourth proportional to 7,626.60, 11,415.60 and 5,439.60 is: 8,142.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,626.60 : 11,415.60 = 5,439.60 : x
  2. Step 2: Convert to fraction form
    7,626.60/11,415.60 = 5,439.60/x
  3. Step 3: Cross multiply
    7,626.60x = 11,415.60 × 5,439.60
  4. Step 4: Simplify right side
    7,626.60x = 62,096,297.76
  5. Step 5: Solve for x
    x = 62,096,297.76/7,626.60
  6. Step 6: Final answer
    x = 8,142.07

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1.5x scale

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.