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Finding the Fourth Proportional to 9,297.60, 13,960.80 and 5,409.60

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Solution

The fourth proportional to 9,297.60, 13,960.80 and 5,409.60 is: 8,122.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,297.60 : 13,960.80 = 5,409.60 : x
  2. Step 2: Convert to fraction form
    9,297.60/13,960.80 = 5,409.60/x
  3. Step 3: Cross multiply
    9,297.60x = 13,960.80 × 5,409.60
  4. Step 4: Simplify right side
    9,297.60x = 75,522,343.68
  5. Step 5: Solve for x
    x = 75,522,343.68/9,297.60
  6. Step 6: Final answer
    x = 8,122.78

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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.