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Finding the Fourth Proportional to 13,911.29, 20,839.11 and 8,361.62

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Solution

The fourth proportional to 13,911.29, 20,839.11 and 8,361.62 is: 12,525.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.29 : 20,839.11 = 8,361.62 : x
  2. Step 2: Convert to fraction form
    13,911.29/20,839.11 = 8,361.62/x
  3. Step 3: Cross multiply
    13,911.29x = 20,839.11 × 8,361.62
  4. Step 4: Simplify right side
    13,911.29x = 174,248,718.96
  5. Step 5: Solve for x
    x = 174,248,718.96/13,911.29
  6. Step 6: Final answer
    x = 12,525.71

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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.