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Finding the Fourth Proportional to 18,754.60, 28,136.64 and 7,067.92

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Solution

The fourth proportional to 18,754.60, 28,136.64 and 7,067.92 is: 10,603.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.60 : 28,136.64 = 7,067.92 : x
  2. Step 2: Convert to fraction form
    18,754.60/28,136.64 = 7,067.92/x
  3. Step 3: Cross multiply
    18,754.60x = 28,136.64 × 7,067.92
  4. Step 4: Simplify right side
    18,754.60x = 198,867,520.59
  5. Step 5: Solve for x
    x = 198,867,520.59/18,754.60
  6. Step 6: Final answer
    x = 10,603.67

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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.