Home / 5,279.21-7,917.98-1,991.52

Finding the Fourth Proportional to 5,279.21, 7,917.98 and 1,991.52

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Solution

The fourth proportional to 5,279.21, 7,917.98 and 1,991.52 is: 2,986.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.21 : 7,917.98 = 1,991.52 : x
  2. Step 2: Convert to fraction form
    5,279.21/7,917.98 = 1,991.52/x
  3. Step 3: Cross multiply
    5,279.21x = 7,917.98 × 1,991.52
  4. Step 4: Simplify right side
    5,279.21x = 15,768,815.53
  5. Step 5: Solve for x
    x = 15,768,815.53/5,279.21
  6. Step 6: Final answer
    x = 2,986.97

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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.