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Finding the Fourth Proportional to 7,690.70, 11,529.12 and 2,759.18

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Solution

The fourth proportional to 7,690.70, 11,529.12 and 2,759.18 is: 4,136.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.70 : 11,529.12 = 2,759.18 : x
  2. Step 2: Convert to fraction form
    7,690.70/11,529.12 = 2,759.18/x
  3. Step 3: Cross multiply
    7,690.70x = 11,529.12 × 2,759.18
  4. Step 4: Simplify right side
    7,690.70x = 31,810,917.32
  5. Step 5: Solve for x
    x = 31,810,917.32/7,690.70
  6. Step 6: Final answer
    x = 4,136.28

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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.