Home / 12,120.22-18,161.70-7,180.03

Finding the Fourth Proportional to 12,120.22, 18,161.70 and 7,180.03

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Solution

The fourth proportional to 12,120.22, 18,161.70 and 7,180.03 is: 10,759.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.22 : 18,161.70 = 7,180.03 : x
  2. Step 2: Convert to fraction form
    12,120.22/18,161.70 = 7,180.03/x
  3. Step 3: Cross multiply
    12,120.22x = 18,161.70 × 7,180.03
  4. Step 4: Simplify right side
    12,120.22x = 130,401,550.85
  5. Step 5: Solve for x
    x = 130,401,550.85/12,120.22
  6. Step 6: Final answer
    x = 10,759.01

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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.