Home / 11,981.12-17,971.90-4,189.93

Finding the Fourth Proportional to 11,981.12, 17,971.90 and 4,189.93

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Solution

The fourth proportional to 11,981.12, 17,971.90 and 4,189.93 is: 6,284.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,981.12 : 17,971.90 = 4,189.93 : x
  2. Step 2: Convert to fraction form
    11,981.12/17,971.90 = 4,189.93/x
  3. Step 3: Cross multiply
    11,981.12x = 17,971.90 × 4,189.93
  4. Step 4: Simplify right side
    11,981.12x = 75,300,947.56
  5. Step 5: Solve for x
    x = 75,300,947.56/11,981.12
  6. Step 6: Final answer
    x = 6,284.97

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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.