Home / 12,189.26-18,285.41-4,289.91

Finding the Fourth Proportional to 12,189.26, 18,285.41 and 4,289.91

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Solution

The fourth proportional to 12,189.26, 18,285.41 and 4,289.91 is: 6,435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.26 : 18,285.41 = 4,289.91 : x
  2. Step 2: Convert to fraction form
    12,189.26/18,285.41 = 4,289.91/x
  3. Step 3: Cross multiply
    12,189.26x = 18,285.41 × 4,289.91
  4. Step 4: Simplify right side
    12,189.26x = 78,442,763.21
  5. Step 5: Solve for x
    x = 78,442,763.21/12,189.26
  6. Step 6: Final answer
    x = 6,435.40

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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.