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Finding the Fourth Proportional to 13,611.53, 20,393.19 and 5,696.61

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Solution

The fourth proportional to 13,611.53, 20,393.19 and 5,696.61 is: 8,534.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.53 : 20,393.19 = 5,696.61 : x
  2. Step 2: Convert to fraction form
    13,611.53/20,393.19 = 5,696.61/x
  3. Step 3: Cross multiply
    13,611.53x = 20,393.19 × 5,696.61
  4. Step 4: Simplify right side
    13,611.53x = 116,172,050.09
  5. Step 5: Solve for x
    x = 116,172,050.09/13,611.53
  6. Step 6: Final answer
    x = 8,534.83

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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.