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Finding the Fourth Proportional to 9,388.58, 12,942.44 and 7,146.55

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Solution

The fourth proportional to 9,388.58, 12,942.44 and 7,146.55 is: 9,851.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.58 : 12,942.44 = 7,146.55 : x
  2. Step 2: Convert to fraction form
    9,388.58/12,942.44 = 7,146.55/x
  3. Step 3: Cross multiply
    9,388.58x = 12,942.44 × 7,146.55
  4. Step 4: Simplify right side
    9,388.58x = 92,493,794.58
  5. Step 5: Solve for x
    x = 92,493,794.58/9,388.58
  6. Step 6: Final answer
    x = 9,851.73

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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.