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Finding the Fourth Proportional to 7,142.64, 10,719 and 3,194.88

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Solution

The fourth proportional to 7,142.64, 10,719 and 3,194.88 is: 4,794.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.64 : 10,719 = 3,194.88 : x
  2. Step 2: Convert to fraction form
    7,142.64/10,719 = 3,194.88/x
  3. Step 3: Cross multiply
    7,142.64x = 10,719 × 3,194.88
  4. Step 4: Simplify right side
    7,142.64x = 34,245,918.72
  5. Step 5: Solve for x
    x = 34,245,918.72/7,142.64
  6. Step 6: Final answer
    x = 4,794.57

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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.