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Finding the Fourth Proportional to 12,272.80, 18,370.80 and 8,816.80

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Solution

The fourth proportional to 12,272.80, 18,370.80 and 8,816.80 is: 13,197.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,272.80 : 18,370.80 = 8,816.80 : x
  2. Step 2: Convert to fraction form
    12,272.80/18,370.80 = 8,816.80/x
  3. Step 3: Cross multiply
    12,272.80x = 18,370.80 × 8,816.80
  4. Step 4: Simplify right side
    12,272.80x = 161,971,669.44
  5. Step 5: Solve for x
    x = 161,971,669.44/12,272.80
  6. Step 6: Final answer
    x = 13,197.61

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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.