Home / 28,921.80-43,382.70-20,584.20

Finding the Fourth Proportional to 28,921.80, 43,382.70 and 20,584.20

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Solution

The fourth proportional to 28,921.80, 43,382.70 and 20,584.20 is: 30,876.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.80 : 43,382.70 = 20,584.20 : x
  2. Step 2: Convert to fraction form
    28,921.80/43,382.70 = 20,584.20/x
  3. Step 3: Cross multiply
    28,921.80x = 43,382.70 × 20,584.20
  4. Step 4: Simplify right side
    28,921.80x = 892,998,173.34
  5. Step 5: Solve for x
    x = 892,998,173.34/28,921.80
  6. Step 6: Final answer
    x = 30,876.30

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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.