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Finding the Fourth Proportional to 7,855.75, 11,786.06 and 2,590.81

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Solution

The fourth proportional to 7,855.75, 11,786.06 and 2,590.81 is: 3,887.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.75 : 11,786.06 = 2,590.81 : x
  2. Step 2: Convert to fraction form
    7,855.75/11,786.06 = 2,590.81/x
  3. Step 3: Cross multiply
    7,855.75x = 11,786.06 × 2,590.81
  4. Step 4: Simplify right side
    7,855.75x = 30,535,442.11
  5. Step 5: Solve for x
    x = 30,535,442.11/7,855.75
  6. Step 6: Final answer
    x = 3,887.02

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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.