Home / 20,511.45-30,746.73-8,668.21

Finding the Fourth Proportional to 20,511.45, 30,746.73 and 8,668.21

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Solution

The fourth proportional to 20,511.45, 30,746.73 and 8,668.21 is: 12,993.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.45 : 30,746.73 = 8,668.21 : x
  2. Step 2: Convert to fraction form
    20,511.45/30,746.73 = 8,668.21/x
  3. Step 3: Cross multiply
    20,511.45x = 30,746.73 × 8,668.21
  4. Step 4: Simplify right side
    20,511.45x = 266,519,112.45
  5. Step 5: Solve for x
    x = 266,519,112.45/20,511.45
  6. Step 6: Final answer
    x = 12,993.67

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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.