Home / 21,379.41-32,042.81-11,999.75

Finding the Fourth Proportional to 21,379.41, 32,042.81 and 11,999.75

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Solution

The fourth proportional to 21,379.41, 32,042.81 and 11,999.75 is: 17,984.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.41 : 32,042.81 = 11,999.75 : x
  2. Step 2: Convert to fraction form
    21,379.41/32,042.81 = 11,999.75/x
  3. Step 3: Cross multiply
    21,379.41x = 32,042.81 × 11,999.75
  4. Step 4: Simplify right side
    21,379.41x = 384,505,579.08
  5. Step 5: Solve for x
    x = 384,505,579.08/21,379.41
  6. Step 6: Final answer
    x = 17,984.85

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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.