Home / 20,138.22-27,790.17-11,185.50

Finding the Fourth Proportional to 20,138.22, 27,790.17 and 11,185.50

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Solution

The fourth proportional to 20,138.22, 27,790.17 and 11,185.50 is: 15,435.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.22 : 27,790.17 = 11,185.50 : x
  2. Step 2: Convert to fraction form
    20,138.22/27,790.17 = 11,185.50/x
  3. Step 3: Cross multiply
    20,138.22x = 27,790.17 × 11,185.50
  4. Step 4: Simplify right side
    20,138.22x = 310,846,946.54
  5. Step 5: Solve for x
    x = 310,846,946.54/20,138.22
  6. Step 6: Final answer
    x = 15,435.67

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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.