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Finding the Fourth Proportional to 7,474.72, 11,212.44 and 3,090.64

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Solution

The fourth proportional to 7,474.72, 11,212.44 and 3,090.64 is: 4,636.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,474.72 : 11,212.44 = 3,090.64 : x
  2. Step 2: Convert to fraction form
    7,474.72/11,212.44 = 3,090.64/x
  3. Step 3: Cross multiply
    7,474.72x = 11,212.44 × 3,090.64
  4. Step 4: Simplify right side
    7,474.72x = 34,653,615.56
  5. Step 5: Solve for x
    x = 34,653,615.56/7,474.72
  6. Step 6: Final answer
    x = 4,636.11

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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.