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Finding the Fourth Proportional to 8,779.78, 13,169.67 and 2,205.96

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Solution

The fourth proportional to 8,779.78, 13,169.67 and 2,205.96 is: 3,308.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.78 : 13,169.67 = 2,205.96 : x
  2. Step 2: Convert to fraction form
    8,779.78/13,169.67 = 2,205.96/x
  3. Step 3: Cross multiply
    8,779.78x = 13,169.67 × 2,205.96
  4. Step 4: Simplify right side
    8,779.78x = 29,051,806.35
  5. Step 5: Solve for x
    x = 29,051,806.35/8,779.78
  6. Step 6: Final answer
    x = 3,308.95

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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.