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Finding the Fourth Proportional to 7,919.02, 11,879.21 and 2,075.63

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Solution

The fourth proportional to 7,919.02, 11,879.21 and 2,075.63 is: 3,113.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.02 : 11,879.21 = 2,075.63 : x
  2. Step 2: Convert to fraction form
    7,919.02/11,879.21 = 2,075.63/x
  3. Step 3: Cross multiply
    7,919.02x = 11,879.21 × 2,075.63
  4. Step 4: Simplify right side
    7,919.02x = 24,656,778.77
  5. Step 5: Solve for x
    x = 24,656,778.77/7,919.02
  6. Step 6: Final answer
    x = 3,113.62

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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.