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Finding the Fourth Proportional to 27,999.75, 41,999.94 and 11,987.13

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Solution

The fourth proportional to 27,999.75, 41,999.94 and 11,987.13 is: 17,980.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.75 : 41,999.94 = 11,987.13 : x
  2. Step 2: Convert to fraction form
    27,999.75/41,999.94 = 11,987.13/x
  3. Step 3: Cross multiply
    27,999.75x = 41,999.94 × 11,987.13
  4. Step 4: Simplify right side
    27,999.75x = 503,458,740.77
  5. Step 5: Solve for x
    x = 503,458,740.77/27,999.75
  6. Step 6: Final answer
    x = 17,980.83

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1.5x scale

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.