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Finding the Fourth Proportional to 8,779.70, 13,168.25 and 3,231.75

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Solution

The fourth proportional to 8,779.70, 13,168.25 and 3,231.75 is: 4,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.70 : 13,168.25 = 3,231.75 : x
  2. Step 2: Convert to fraction form
    8,779.70/13,168.25 = 3,231.75/x
  3. Step 3: Cross multiply
    8,779.70x = 13,168.25 × 3,231.75
  4. Step 4: Simplify right side
    8,779.70x = 42,556,491.94
  5. Step 5: Solve for x
    x = 42,556,491.94/8,779.70
  6. Step 6: Final answer
    x = 4,847.15

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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.