Home / 11,311.31-16,972.62-5,075.78

Finding the Fourth Proportional to 11,311.31, 16,972.62 and 5,075.78

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Solution

The fourth proportional to 11,311.31, 16,972.62 and 5,075.78 is: 7,616.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,311.31 : 16,972.62 = 5,075.78 : x
  2. Step 2: Convert to fraction form
    11,311.31/16,972.62 = 5,075.78/x
  3. Step 3: Cross multiply
    11,311.31x = 16,972.62 × 5,075.78
  4. Step 4: Simplify right side
    11,311.31x = 86,149,174.90
  5. Step 5: Solve for x
    x = 86,149,174.90/11,311.31
  6. Step 6: Final answer
    x = 7,616.20

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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.