Home / 8,679.20-13,021.16-3,488.72

Finding the Fourth Proportional to 8,679.20, 13,021.16 and 3,488.72

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Solution

The fourth proportional to 8,679.20, 13,021.16 and 3,488.72 is: 5,234.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.20 : 13,021.16 = 3,488.72 : x
  2. Step 2: Convert to fraction form
    8,679.20/13,021.16 = 3,488.72/x
  3. Step 3: Cross multiply
    8,679.20x = 13,021.16 × 3,488.72
  4. Step 4: Simplify right side
    8,679.20x = 45,427,181.32
  5. Step 5: Solve for x
    x = 45,427,181.32/8,679.20
  6. Step 6: Final answer
    x = 5,234.03

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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.