Home / 18,211.20-27,316.80-11,289.60

Finding the Fourth Proportional to 18,211.20, 27,316.80 and 11,289.60

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Solution

The fourth proportional to 18,211.20, 27,316.80 and 11,289.60 is: 16,934.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.20 : 27,316.80 = 11,289.60 : x
  2. Step 2: Convert to fraction form
    18,211.20/27,316.80 = 11,289.60/x
  3. Step 3: Cross multiply
    18,211.20x = 27,316.80 × 11,289.60
  4. Step 4: Simplify right side
    18,211.20x = 308,395,745.28
  5. Step 5: Solve for x
    x = 308,395,745.28/18,211.20
  6. Step 6: Final answer
    x = 16,934.40

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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.