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Finding the Fourth Proportional to 7,754.75, 11,621.70 and 4,239.48

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Solution

The fourth proportional to 7,754.75, 11,621.70 and 4,239.48 is: 6,353.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,754.75 : 11,621.70 = 4,239.48 : x
  2. Step 2: Convert to fraction form
    7,754.75/11,621.70 = 4,239.48/x
  3. Step 3: Cross multiply
    7,754.75x = 11,621.70 × 4,239.48
  4. Step 4: Simplify right side
    7,754.75x = 49,269,964.72
  5. Step 5: Solve for x
    x = 49,269,964.72/7,754.75
  6. Step 6: Final answer
    x = 6,353.52

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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.