Home / 20,858.24-28,786.44-11,907.09

Finding the Fourth Proportional to 20,858.24, 28,786.44 and 11,907.09

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Solution

The fourth proportional to 20,858.24, 28,786.44 and 11,907.09 is: 16,432.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.24 : 28,786.44 = 11,907.09 : x
  2. Step 2: Convert to fraction form
    20,858.24/28,786.44 = 11,907.09/x
  3. Step 3: Cross multiply
    20,858.24x = 28,786.44 × 11,907.09
  4. Step 4: Simplify right side
    20,858.24x = 342,762,731.86
  5. Step 5: Solve for x
    x = 342,762,731.86/20,858.24
  6. Step 6: Final answer
    x = 16,432.97

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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.