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Finding the Fourth Proportional to 22,112.40, 33,168.60 and 20,643.60

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Solution

The fourth proportional to 22,112.40, 33,168.60 and 20,643.60 is: 30,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,112.40 : 33,168.60 = 20,643.60 : x
  2. Step 2: Convert to fraction form
    22,112.40/33,168.60 = 20,643.60/x
  3. Step 3: Cross multiply
    22,112.40x = 33,168.60 × 20,643.60
  4. Step 4: Simplify right side
    22,112.40x = 684,719,310.96
  5. Step 5: Solve for x
    x = 684,719,310.96/22,112.40
  6. Step 6: Final answer
    x = 30,965.40

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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.