Home / 20,636.20-28,467.30-13,069.80

Finding the Fourth Proportional to 20,636.20, 28,467.30 and 13,069.80

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Solution

The fourth proportional to 20,636.20, 28,467.30 and 13,069.80 is: 18,029.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.20 : 28,467.30 = 13,069.80 : x
  2. Step 2: Convert to fraction form
    20,636.20/28,467.30 = 13,069.80/x
  3. Step 3: Cross multiply
    20,636.20x = 28,467.30 × 13,069.80
  4. Step 4: Simplify right side
    20,636.20x = 372,061,917.54
  5. Step 5: Solve for x
    x = 372,061,917.54/20,636.20
  6. Step 6: Final answer
    x = 18,029.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.