Home / 12,172.26-18,289.17-11,680.20

Finding the Fourth Proportional to 12,172.26, 18,289.17 and 11,680.20

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Solution

The fourth proportional to 12,172.26, 18,289.17 and 11,680.20 is: 17,549.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.26 : 18,289.17 = 11,680.20 : x
  2. Step 2: Convert to fraction form
    12,172.26/18,289.17 = 11,680.20/x
  3. Step 3: Cross multiply
    12,172.26x = 18,289.17 × 11,680.20
  4. Step 4: Simplify right side
    12,172.26x = 213,621,163.43
  5. Step 5: Solve for x
    x = 213,621,163.43/12,172.26
  6. Step 6: Final answer
    x = 17,549.84

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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.