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Finding the Fourth Proportional to 12,007.20, 18,016.20 and 4,221.60

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Solution

The fourth proportional to 12,007.20, 18,016.20 and 4,221.60 is: 6,334.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,007.20 : 18,016.20 = 4,221.60 : x
  2. Step 2: Convert to fraction form
    12,007.20/18,016.20 = 4,221.60/x
  3. Step 3: Cross multiply
    12,007.20x = 18,016.20 × 4,221.60
  4. Step 4: Simplify right side
    12,007.20x = 76,057,189.92
  5. Step 5: Solve for x
    x = 76,057,189.92/12,007.20
  6. Step 6: Final answer
    x = 6,334.30

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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.