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Finding the Fourth Proportional to 12,119.76, 16,719.36 and 8,584.80

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Solution

The fourth proportional to 12,119.76, 16,719.36 and 8,584.80 is: 11,842.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.76 : 16,719.36 = 8,584.80 : x
  2. Step 2: Convert to fraction form
    12,119.76/16,719.36 = 8,584.80/x
  3. Step 3: Cross multiply
    12,119.76x = 16,719.36 × 8,584.80
  4. Step 4: Simplify right side
    12,119.76x = 143,532,361.73
  5. Step 5: Solve for x
    x = 143,532,361.73/12,119.76
  6. Step 6: Final answer
    x = 11,842.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.