Home / 11,980.95-17,971.42-3,215.86

Finding the Fourth Proportional to 11,980.95, 17,971.42 and 3,215.86

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Solution

The fourth proportional to 11,980.95, 17,971.42 and 3,215.86 is: 4,823.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.95 : 17,971.42 = 3,215.86 : x
  2. Step 2: Convert to fraction form
    11,980.95/17,971.42 = 3,215.86/x
  3. Step 3: Cross multiply
    11,980.95x = 17,971.42 × 3,215.86
  4. Step 4: Simplify right side
    11,980.95x = 57,793,562.68
  5. Step 5: Solve for x
    x = 57,793,562.68/11,980.95
  6. Step 6: Final answer
    x = 4,823.79

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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.