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Finding the Fourth Proportional to 6,728.56, 10,090.28 and 3,078

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Solution

The fourth proportional to 6,728.56, 10,090.28 and 3,078 is: 4,615.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,728.56 : 10,090.28 = 3,078 : x
  2. Step 2: Convert to fraction form
    6,728.56/10,090.28 = 3,078/x
  3. Step 3: Cross multiply
    6,728.56x = 10,090.28 × 3,078
  4. Step 4: Simplify right side
    6,728.56x = 31,057,881.84
  5. Step 5: Solve for x
    x = 31,057,881.84/6,728.56
  6. Step 6: Final answer
    x = 4,615.83

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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.