Home / 12,121.22-18,163.20-7,181.03

Finding the Fourth Proportional to 12,121.22, 18,163.20 and 7,181.03

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Solution

The fourth proportional to 12,121.22, 18,163.20 and 7,181.03 is: 10,760.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.22 : 18,163.20 = 7,181.03 : x
  2. Step 2: Convert to fraction form
    12,121.22/18,163.20 = 7,181.03/x
  3. Step 3: Cross multiply
    12,121.22x = 18,163.20 × 7,181.03
  4. Step 4: Simplify right side
    12,121.22x = 130,430,484.10
  5. Step 5: Solve for x
    x = 130,430,484.10/12,121.22
  6. Step 6: Final answer
    x = 10,760.51

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1.5x scale

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.