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Finding the Fourth Proportional to 11,999.51, 17,999.80 and 3,678.92

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Solution

The fourth proportional to 11,999.51, 17,999.80 and 3,678.92 is: 5,518.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.51 : 17,999.80 = 3,678.92 : x
  2. Step 2: Convert to fraction form
    11,999.51/17,999.80 = 3,678.92/x
  3. Step 3: Cross multiply
    11,999.51x = 17,999.80 × 3,678.92
  4. Step 4: Simplify right side
    11,999.51x = 66,219,725.02
  5. Step 5: Solve for x
    x = 66,219,725.02/11,999.51
  6. Step 6: Final answer
    x = 5,518.54

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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.