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Finding the Fourth Proportional to 8,525.60, 12,789.80 and 2,680.80

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Solution

The fourth proportional to 8,525.60, 12,789.80 and 2,680.80 is: 4,021.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,525.60 : 12,789.80 = 2,680.80 : x
  2. Step 2: Convert to fraction form
    8,525.60/12,789.80 = 2,680.80/x
  3. Step 3: Cross multiply
    8,525.60x = 12,789.80 × 2,680.80
  4. Step 4: Simplify right side
    8,525.60x = 34,286,895.84
  5. Step 5: Solve for x
    x = 34,286,895.84/8,525.60
  6. Step 6: Final answer
    x = 4,021.64

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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.