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Finding the Fourth Proportional to 7,809.08, 11,714.70 and 3,191

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Solution

The fourth proportional to 7,809.08, 11,714.70 and 3,191 is: 4,786.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.08 : 11,714.70 = 3,191 : x
  2. Step 2: Convert to fraction form
    7,809.08/11,714.70 = 3,191/x
  3. Step 3: Cross multiply
    7,809.08x = 11,714.70 × 3,191
  4. Step 4: Simplify right side
    7,809.08x = 37,381,607.70
  5. Step 5: Solve for x
    x = 37,381,607.70/7,809.08
  6. Step 6: Final answer
    x = 4,786.94

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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.