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Finding the Fourth Proportional to 9,172.97, 12,658.74 and 5,194.86

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Solution

The fourth proportional to 9,172.97, 12,658.74 and 5,194.86 is: 7,168.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,172.97 : 12,658.74 = 5,194.86 : x
  2. Step 2: Convert to fraction form
    9,172.97/12,658.74 = 5,194.86/x
  3. Step 3: Cross multiply
    9,172.97x = 12,658.74 × 5,194.86
  4. Step 4: Simplify right side
    9,172.97x = 65,760,318.78
  5. Step 5: Solve for x
    x = 65,760,318.78/9,172.97
  6. Step 6: Final answer
    x = 7,168.93

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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.