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Finding the Fourth Proportional to 8,321.15, 12,479.49 and 2,774.67

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Solution

The fourth proportional to 8,321.15, 12,479.49 and 2,774.67 is: 4,161.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.15 : 12,479.49 = 2,774.67 : x
  2. Step 2: Convert to fraction form
    8,321.15/12,479.49 = 2,774.67/x
  3. Step 3: Cross multiply
    8,321.15x = 12,479.49 × 2,774.67
  4. Step 4: Simplify right side
    8,321.15x = 34,626,466.52
  5. Step 5: Solve for x
    x = 34,626,466.52/8,321.15
  6. Step 6: Final answer
    x = 4,161.26

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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.