Home / 13,563.90-20,321.93-11,879.23

Finding the Fourth Proportional to 13,563.90, 20,321.93 and 11,879.23

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Solution

The fourth proportional to 13,563.90, 20,321.93 and 11,879.23 is: 17,797.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.90 : 20,321.93 = 11,879.23 : x
  2. Step 2: Convert to fraction form
    13,563.90/20,321.93 = 11,879.23/x
  3. Step 3: Cross multiply
    13,563.90x = 20,321.93 × 11,879.23
  4. Step 4: Simplify right side
    13,563.90x = 241,408,859.41
  5. Step 5: Solve for x
    x = 241,408,859.41/13,563.90
  6. Step 6: Final answer
    x = 17,797.89

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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.