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Finding the Fourth Proportional to 12,908.96, 19,361.20 and 3,675.68

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Solution

The fourth proportional to 12,908.96, 19,361.20 and 3,675.68 is: 5,512.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.96 : 19,361.20 = 3,675.68 : x
  2. Step 2: Convert to fraction form
    12,908.96/19,361.20 = 3,675.68/x
  3. Step 3: Cross multiply
    12,908.96x = 19,361.20 × 3,675.68
  4. Step 4: Simplify right side
    12,908.96x = 71,165,575.62
  5. Step 5: Solve for x
    x = 71,165,575.62/12,908.96
  6. Step 6: Final answer
    x = 5,512.88

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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.