Home / 20,139.20-30,208.80-19,793.60

Finding the Fourth Proportional to 20,139.20, 30,208.80 and 19,793.60

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Solution

The fourth proportional to 20,139.20, 30,208.80 and 19,793.60 is: 29,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.20 : 30,208.80 = 19,793.60 : x
  2. Step 2: Convert to fraction form
    20,139.20/30,208.80 = 19,793.60/x
  3. Step 3: Cross multiply
    20,139.20x = 30,208.80 × 19,793.60
  4. Step 4: Simplify right side
    20,139.20x = 597,940,903.68
  5. Step 5: Solve for x
    x = 597,940,903.68/20,139.20
  6. Step 6: Final answer
    x = 29,690.40

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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.