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Finding the Fourth Proportional to 19,271.92, 28,911.96 and 6,791.44

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Solution

The fourth proportional to 19,271.92, 28,911.96 and 6,791.44 is: 10,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.92 : 28,911.96 = 6,791.44 : x
  2. Step 2: Convert to fraction form
    19,271.92/28,911.96 = 6,791.44/x
  3. Step 3: Cross multiply
    19,271.92x = 28,911.96 × 6,791.44
  4. Step 4: Simplify right side
    19,271.92x = 196,353,841.62
  5. Step 5: Solve for x
    x = 196,353,841.62/19,271.92
  6. Step 6: Final answer
    x = 10,188.60

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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.