Home / 20,999.48-31,479.78-11,759

Finding the Fourth Proportional to 20,999.48, 31,479.78 and 11,759

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Solution

The fourth proportional to 20,999.48, 31,479.78 and 11,759 is: 17,627.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.48 : 31,479.78 = 11,759 : x
  2. Step 2: Convert to fraction form
    20,999.48/31,479.78 = 11,759/x
  3. Step 3: Cross multiply
    20,999.48x = 31,479.78 × 11,759
  4. Step 4: Simplify right side
    20,999.48x = 370,170,733.02
  5. Step 5: Solve for x
    x = 370,170,733.02/20,999.48
  6. Step 6: Final answer
    x = 17,627.61

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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.