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Finding the Fourth Proportional to 8,409.90, 12,613.41 and 2,786.88

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Solution

The fourth proportional to 8,409.90, 12,613.41 and 2,786.88 is: 4,179.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,409.90 : 12,613.41 = 2,786.88 : x
  2. Step 2: Convert to fraction form
    8,409.90/12,613.41 = 2,786.88/x
  3. Step 3: Cross multiply
    8,409.90x = 12,613.41 × 2,786.88
  4. Step 4: Simplify right side
    8,409.90x = 35,152,060.06
  5. Step 5: Solve for x
    x = 35,152,060.06/8,409.90
  6. Step 6: Final answer
    x = 4,179.84

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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.