Home / 12,121.20-18,181.80-9,496.80

Finding the Fourth Proportional to 12,121.20, 18,181.80 and 9,496.80

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Solution

The fourth proportional to 12,121.20, 18,181.80 and 9,496.80 is: 14,245.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.20 : 18,181.80 = 9,496.80 : x
  2. Step 2: Convert to fraction form
    12,121.20/18,181.80 = 9,496.80/x
  3. Step 3: Cross multiply
    12,121.20x = 18,181.80 × 9,496.80
  4. Step 4: Simplify right side
    12,121.20x = 172,668,918.24
  5. Step 5: Solve for x
    x = 172,668,918.24/12,121.20
  6. Step 6: Final answer
    x = 14,245.20

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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.