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Finding the Fourth Proportional to 7,679.07, 11,509.11 and 3,979.17

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Solution

The fourth proportional to 7,679.07, 11,509.11 and 3,979.17 is: 5,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.07 : 11,509.11 = 3,979.17 : x
  2. Step 2: Convert to fraction form
    7,679.07/11,509.11 = 3,979.17/x
  3. Step 3: Cross multiply
    7,679.07x = 11,509.11 × 3,979.17
  4. Step 4: Simplify right side
    7,679.07x = 45,796,705.24
  5. Step 5: Solve for x
    x = 45,796,705.24/7,679.07
  6. Step 6: Final answer
    x = 5,963.83

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1.5x scale

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.