Home / 7,789.42-11,687.56-4,090.79

Finding the Fourth Proportional to 7,789.42, 11,687.56 and 4,090.79

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Solution

The fourth proportional to 7,789.42, 11,687.56 and 4,090.79 is: 6,137.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,789.42 : 11,687.56 = 4,090.79 : x
  2. Step 2: Convert to fraction form
    7,789.42/11,687.56 = 4,090.79/x
  3. Step 3: Cross multiply
    7,789.42x = 11,687.56 × 4,090.79
  4. Step 4: Simplify right side
    7,789.42x = 47,811,353.57
  5. Step 5: Solve for x
    x = 47,811,353.57/7,789.42
  6. Step 6: Final answer
    x = 6,137.99

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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.