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Finding the Fourth Proportional to 5,327.87, 7,991.87 and 2,987.51

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Solution

The fourth proportional to 5,327.87, 7,991.87 and 2,987.51 is: 4,481.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,327.87 : 7,991.87 = 2,987.51 : x
  2. Step 2: Convert to fraction form
    5,327.87/7,991.87 = 2,987.51/x
  3. Step 3: Cross multiply
    5,327.87x = 7,991.87 × 2,987.51
  4. Step 4: Simplify right side
    5,327.87x = 23,875,736.65
  5. Step 5: Solve for x
    x = 23,875,736.65/5,327.87
  6. Step 6: Final answer
    x = 4,481.30

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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.