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Finding the Fourth Proportional to 12,143.93, 16,835.04 and 11,478.71

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Solution

The fourth proportional to 12,143.93, 16,835.04 and 11,478.71 is: 15,912.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.93 : 16,835.04 = 11,478.71 : x
  2. Step 2: Convert to fraction form
    12,143.93/16,835.04 = 11,478.71/x
  3. Step 3: Cross multiply
    12,143.93x = 16,835.04 × 11,478.71
  4. Step 4: Simplify right side
    12,143.93x = 193,244,584.09
  5. Step 5: Solve for x
    x = 193,244,584.09/12,143.93
  6. Step 6: Final answer
    x = 15,912.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.