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Finding the Fourth Proportional to 33,811.20, 50,619.60 and 20,689.20

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Solution

The fourth proportional to 33,811.20, 50,619.60 and 20,689.20 is: 30,974.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,811.20 : 50,619.60 = 20,689.20 : x
  2. Step 2: Convert to fraction form
    33,811.20/50,619.60 = 20,689.20/x
  3. Step 3: Cross multiply
    33,811.20x = 50,619.60 × 20,689.20
  4. Step 4: Simplify right side
    33,811.20x = 1,047,279,028.32
  5. Step 5: Solve for x
    x = 1,047,279,028.32/33,811.20
  6. Step 6: Final answer
    x = 30,974.32

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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.