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Finding the Fourth Proportional to 7,396.40, 11,094.60 and 3,940.40

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Solution

The fourth proportional to 7,396.40, 11,094.60 and 3,940.40 is: 5,910.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,396.40 : 11,094.60 = 3,940.40 : x
  2. Step 2: Convert to fraction form
    7,396.40/11,094.60 = 3,940.40/x
  3. Step 3: Cross multiply
    7,396.40x = 11,094.60 × 3,940.40
  4. Step 4: Simplify right side
    7,396.40x = 43,717,161.84
  5. Step 5: Solve for x
    x = 43,717,161.84/7,396.40
  6. Step 6: Final answer
    x = 5,910.60

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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.