Home / 19,228.20-28,842.30-11,879.40

Finding the Fourth Proportional to 19,228.20, 28,842.30 and 11,879.40

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Solution

The fourth proportional to 19,228.20, 28,842.30 and 11,879.40 is: 17,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,228.20 : 28,842.30 = 11,879.40 : x
  2. Step 2: Convert to fraction form
    19,228.20/28,842.30 = 11,879.40/x
  3. Step 3: Cross multiply
    19,228.20x = 28,842.30 × 11,879.40
  4. Step 4: Simplify right side
    19,228.20x = 342,629,218.62
  5. Step 5: Solve for x
    x = 342,629,218.62/19,228.20
  6. Step 6: Final answer
    x = 17,819.10

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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.