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Finding the Fourth Proportional to 13,855.67, 20,779.10 and 4,493.49

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Solution

The fourth proportional to 13,855.67, 20,779.10 and 4,493.49 is: 6,738.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.67 : 20,779.10 = 4,493.49 : x
  2. Step 2: Convert to fraction form
    13,855.67/20,779.10 = 4,493.49/x
  3. Step 3: Cross multiply
    13,855.67x = 20,779.10 × 4,493.49
  4. Step 4: Simplify right side
    13,855.67x = 93,370,655.59
  5. Step 5: Solve for x
    x = 93,370,655.59/13,855.67
  6. Step 6: Final answer
    x = 6,738.81

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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.