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Finding the Fourth Proportional to 8,321.58, 12,478.19 and 2,772.95

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Solution

The fourth proportional to 8,321.58, 12,478.19 and 2,772.95 is: 4,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.58 : 12,478.19 = 2,772.95 : x
  2. Step 2: Convert to fraction form
    8,321.58/12,478.19 = 2,772.95/x
  3. Step 3: Cross multiply
    8,321.58x = 12,478.19 × 2,772.95
  4. Step 4: Simplify right side
    8,321.58x = 34,601,320.70
  5. Step 5: Solve for x
    x = 34,601,320.70/8,321.58
  6. Step 6: Final answer
    x = 4,158.02

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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.