Home / 10,855.31-16,286.00-5,311.80

Finding the Fourth Proportional to 10,855.31, 16,286.00 and 5,311.80

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Solution

The fourth proportional to 10,855.31, 16,286.00 and 5,311.80 is: 7,969.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,855.31 : 16,286.00 = 5,311.80 : x
  2. Step 2: Convert to fraction form
    10,855.31/16,286.00 = 5,311.80/x
  3. Step 3: Cross multiply
    10,855.31x = 16,286.00 × 5,311.80
  4. Step 4: Simplify right side
    10,855.31x = 86,507,948.24
  5. Step 5: Solve for x
    x = 86,507,948.24/10,855.31
  6. Step 6: Final answer
    x = 7,969.19

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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.