Home / 20,289.20-30,436.64-9,198.68

Finding the Fourth Proportional to 20,289.20, 30,436.64 and 9,198.68

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Solution

The fourth proportional to 20,289.20, 30,436.64 and 9,198.68 is: 13,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.20 : 30,436.64 = 9,198.68 : x
  2. Step 2: Convert to fraction form
    20,289.20/30,436.64 = 9,198.68/x
  3. Step 3: Cross multiply
    20,289.20x = 30,436.64 × 9,198.68
  4. Step 4: Simplify right side
    20,289.20x = 279,976,911.64
  5. Step 5: Solve for x
    x = 279,976,911.64/20,289.20
  6. Step 6: Final answer
    x = 13,799.31

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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.