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Finding the Fourth Proportional to 7,245.40, 10,847.40 and 4,772.64

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Solution

The fourth proportional to 7,245.40, 10,847.40 and 4,772.64 is: 7,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,245.40 : 10,847.40 = 4,772.64 : x
  2. Step 2: Convert to fraction form
    7,245.40/10,847.40 = 4,772.64/x
  3. Step 3: Cross multiply
    7,245.40x = 10,847.40 × 4,772.64
  4. Step 4: Simplify right side
    7,245.40x = 51,770,735.14
  5. Step 5: Solve for x
    x = 51,770,735.14/7,245.40
  6. Step 6: Final answer
    x = 7,145.32

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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.