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Finding the Fourth Proportional to 8,520.68, 12,782.76 and 3,255.32

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Solution

The fourth proportional to 8,520.68, 12,782.76 and 3,255.32 is: 4,883.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.68 : 12,782.76 = 3,255.32 : x
  2. Step 2: Convert to fraction form
    8,520.68/12,782.76 = 3,255.32/x
  3. Step 3: Cross multiply
    8,520.68x = 12,782.76 × 3,255.32
  4. Step 4: Simplify right side
    8,520.68x = 41,611,974.28
  5. Step 5: Solve for x
    x = 41,611,974.28/8,520.68
  6. Step 6: Final answer
    x = 4,883.64

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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.