Home / 7,679.90-11,520.04-2,749.88

Finding the Fourth Proportional to 7,679.90, 11,520.04 and 2,749.88

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Solution

The fourth proportional to 7,679.90, 11,520.04 and 2,749.88 is: 4,124.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.90 : 11,520.04 = 2,749.88 : x
  2. Step 2: Convert to fraction form
    7,679.90/11,520.04 = 2,749.88/x
  3. Step 3: Cross multiply
    7,679.90x = 11,520.04 × 2,749.88
  4. Step 4: Simplify right side
    7,679.90x = 31,678,727.60
  5. Step 5: Solve for x
    x = 31,678,727.60/7,679.90
  6. Step 6: Final answer
    x = 4,124.89

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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.