Home / 13,621.08-18,796.80-8,031

Finding the Fourth Proportional to 13,621.08, 18,796.80 and 8,031

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Solution

The fourth proportional to 13,621.08, 18,796.80 and 8,031 is: 11,082.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.08 : 18,796.80 = 8,031 : x
  2. Step 2: Convert to fraction form
    13,621.08/18,796.80 = 8,031/x
  3. Step 3: Cross multiply
    13,621.08x = 18,796.80 × 8,031
  4. Step 4: Simplify right side
    13,621.08x = 150,957,100.80
  5. Step 5: Solve for x
    x = 150,957,100.80/13,621.08
  6. Step 6: Final answer
    x = 11,082.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.