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Finding the Fourth Proportional to 7,321.75, 10,993.56 and 7,212.40

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Solution

The fourth proportional to 7,321.75, 10,993.56 and 7,212.40 is: 10,829.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.75 : 10,993.56 = 7,212.40 : x
  2. Step 2: Convert to fraction form
    7,321.75/10,993.56 = 7,212.40/x
  3. Step 3: Cross multiply
    7,321.75x = 10,993.56 × 7,212.40
  4. Step 4: Simplify right side
    7,321.75x = 79,289,924.66
  5. Step 5: Solve for x
    x = 79,289,924.66/7,321.75
  6. Step 6: Final answer
    x = 10,829.37

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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.