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Finding the Fourth Proportional to 7,679.36, 11,512.36 and 3,979.64

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Solution

The fourth proportional to 7,679.36, 11,512.36 and 3,979.64 is: 5,966.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.36 : 11,512.36 = 3,979.64 : x
  2. Step 2: Convert to fraction form
    7,679.36/11,512.36 = 3,979.64/x
  3. Step 3: Cross multiply
    7,679.36x = 11,512.36 × 3,979.64
  4. Step 4: Simplify right side
    7,679.36x = 45,815,048.35
  5. Step 5: Solve for x
    x = 45,815,048.35/7,679.36
  6. Step 6: Final answer
    x = 5,966.00

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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.