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Finding the Fourth Proportional to 7,679.82, 11,519.72 and 2,133.16

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Solution

The fourth proportional to 7,679.82, 11,519.72 and 2,133.16 is: 3,199.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.82 : 11,519.72 = 2,133.16 : x
  2. Step 2: Convert to fraction form
    7,679.82/11,519.72 = 2,133.16/x
  3. Step 3: Cross multiply
    7,679.82x = 11,519.72 × 2,133.16
  4. Step 4: Simplify right side
    7,679.82x = 24,573,405.92
  5. Step 5: Solve for x
    x = 24,573,405.92/7,679.82
  6. Step 6: Final answer
    x = 3,199.74

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Similar ratio
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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.