Home / 20,511.33-30,768.21-5,520.66

Finding the Fourth Proportional to 20,511.33, 30,768.21 and 5,520.66

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Solution

The fourth proportional to 20,511.33, 30,768.21 and 5,520.66 is: 8,281.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.33 : 30,768.21 = 5,520.66 : x
  2. Step 2: Convert to fraction form
    20,511.33/30,768.21 = 5,520.66/x
  3. Step 3: Cross multiply
    20,511.33x = 30,768.21 × 5,520.66
  4. Step 4: Simplify right side
    20,511.33x = 169,860,826.22
  5. Step 5: Solve for x
    x = 169,860,826.22/20,511.33
  6. Step 6: Final answer
    x = 8,281.32

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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.