Home / 20,112.20-30,168.30-13,113.80

Finding the Fourth Proportional to 20,112.20, 30,168.30 and 13,113.80

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Solution

The fourth proportional to 20,112.20, 30,168.30 and 13,113.80 is: 19,670.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.20 : 30,168.30 = 13,113.80 : x
  2. Step 2: Convert to fraction form
    20,112.20/30,168.30 = 13,113.80/x
  3. Step 3: Cross multiply
    20,112.20x = 30,168.30 × 13,113.80
  4. Step 4: Simplify right side
    20,112.20x = 395,621,052.54
  5. Step 5: Solve for x
    x = 395,621,052.54/20,112.20
  6. Step 6: Final answer
    x = 19,670.70

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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.