Home / 20,628.64-30,879.54-13,240.21

Finding the Fourth Proportional to 20,628.64, 30,879.54 and 13,240.21

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Solution

The fourth proportional to 20,628.64, 30,879.54 and 13,240.21 is: 19,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.64 : 30,879.54 = 13,240.21 : x
  2. Step 2: Convert to fraction form
    20,628.64/30,879.54 = 13,240.21/x
  3. Step 3: Cross multiply
    20,628.64x = 30,879.54 × 13,240.21
  4. Step 4: Simplify right side
    20,628.64x = 408,851,594.30
  5. Step 5: Solve for x
    x = 408,851,594.30/20,628.64
  6. Step 6: Final answer
    x = 19,819.61

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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.