Home / 20,012.20-30,053.82-18,991.24

Finding the Fourth Proportional to 20,012.20, 30,053.82 and 18,991.24

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Solution

The fourth proportional to 20,012.20, 30,053.82 and 18,991.24 is: 28,520.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.20 : 30,053.82 = 18,991.24 : x
  2. Step 2: Convert to fraction form
    20,012.20/30,053.82 = 18,991.24/x
  3. Step 3: Cross multiply
    20,012.20x = 30,053.82 × 18,991.24
  4. Step 4: Simplify right side
    20,012.20x = 570,759,308.54
  5. Step 5: Solve for x
    x = 570,759,308.54/20,012.20
  6. Step 6: Final answer
    x = 28,520.57

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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.