Home / 20,698.20-28,563.30-11,745.90

Finding the Fourth Proportional to 20,698.20, 28,563.30 and 11,745.90

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Solution

The fourth proportional to 20,698.20, 28,563.30 and 11,745.90 is: 16,209.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.20 : 28,563.30 = 11,745.90 : x
  2. Step 2: Convert to fraction form
    20,698.20/28,563.30 = 11,745.90/x
  3. Step 3: Cross multiply
    20,698.20x = 28,563.30 × 11,745.90
  4. Step 4: Simplify right side
    20,698.20x = 335,501,665.47
  5. Step 5: Solve for x
    x = 335,501,665.47/20,698.20
  6. Step 6: Final answer
    x = 16,209.22

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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.