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Finding the Fourth Proportional to 7,679.72, 11,512.72 and 2,998.64

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Solution

The fourth proportional to 7,679.72, 11,512.72 and 2,998.64 is: 4,495.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.72 : 11,512.72 = 2,998.64 : x
  2. Step 2: Convert to fraction form
    7,679.72/11,512.72 = 2,998.64/x
  3. Step 3: Cross multiply
    7,679.72x = 11,512.72 × 2,998.64
  4. Step 4: Simplify right side
    7,679.72x = 34,522,502.70
  5. Step 5: Solve for x
    x = 34,522,502.70/7,679.72
  6. Step 6: Final answer
    x = 4,495.28

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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.