Home / 7,789.43-11,678.48-3,108.03

Finding the Fourth Proportional to 7,789.43, 11,678.48 and 3,108.03

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Solution

The fourth proportional to 7,789.43, 11,678.48 and 3,108.03 is: 4,659.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,789.43 : 11,678.48 = 3,108.03 : x
  2. Step 2: Convert to fraction form
    7,789.43/11,678.48 = 3,108.03/x
  3. Step 3: Cross multiply
    7,789.43x = 11,678.48 × 3,108.03
  4. Step 4: Simplify right side
    7,789.43x = 36,297,066.19
  5. Step 5: Solve for x
    x = 36,297,066.19/7,789.43
  6. Step 6: Final answer
    x = 4,659.78

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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.