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Finding the Fourth Proportional to 7,245.25, 10,861.72 and 6,900.80

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Solution

The fourth proportional to 7,245.25, 10,861.72 and 6,900.80 is: 10,345.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,245.25 : 10,861.72 = 6,900.80 : x
  2. Step 2: Convert to fraction form
    7,245.25/10,861.72 = 6,900.80/x
  3. Step 3: Cross multiply
    7,245.25x = 10,861.72 × 6,900.80
  4. Step 4: Simplify right side
    7,245.25x = 74,954,485.82
  5. Step 5: Solve for x
    x = 74,954,485.82/7,245.25
  6. Step 6: Final answer
    x = 10,345.33

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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.