Home / 30,150.80-45,226.20-20,819.60

Finding the Fourth Proportional to 30,150.80, 45,226.20 and 20,819.60

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Solution

The fourth proportional to 30,150.80, 45,226.20 and 20,819.60 is: 31,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,150.80 : 45,226.20 = 20,819.60 : x
  2. Step 2: Convert to fraction form
    30,150.80/45,226.20 = 20,819.60/x
  3. Step 3: Cross multiply
    30,150.80x = 45,226.20 × 20,819.60
  4. Step 4: Simplify right side
    30,150.80x = 941,591,393.52
  5. Step 5: Solve for x
    x = 941,591,393.52/30,150.80
  6. Step 6: Final answer
    x = 31,229.40

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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.