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Finding the Fourth Proportional to 5,640.72, 8,460.98 and 1,942.87

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Solution

The fourth proportional to 5,640.72, 8,460.98 and 1,942.87 is: 2,914.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.72 : 8,460.98 = 1,942.87 : x
  2. Step 2: Convert to fraction form
    5,640.72/8,460.98 = 1,942.87/x
  3. Step 3: Cross multiply
    5,640.72x = 8,460.98 × 1,942.87
  4. Step 4: Simplify right side
    5,640.72x = 16,438,584.21
  5. Step 5: Solve for x
    x = 16,438,584.21/5,640.72
  6. Step 6: Final answer
    x = 2,914.27

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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.