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Finding the Fourth Proportional to 13,855.53, 20,786.21 and 4,494.82

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Solution

The fourth proportional to 13,855.53, 20,786.21 and 4,494.82 is: 6,743.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.53 : 20,786.21 = 4,494.82 : x
  2. Step 2: Convert to fraction form
    13,855.53/20,786.21 = 4,494.82/x
  3. Step 3: Cross multiply
    13,855.53x = 20,786.21 × 4,494.82
  4. Step 4: Simplify right side
    13,855.53x = 93,430,168.50
  5. Step 5: Solve for x
    x = 93,430,168.50/13,855.53
  6. Step 6: Final answer
    x = 6,743.17

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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.