Home / 21,879.67-30,194.64-12,448.84

Finding the Fourth Proportional to 21,879.67, 30,194.64 and 12,448.84

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Solution

The fourth proportional to 21,879.67, 30,194.64 and 12,448.84 is: 17,179.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.67 : 30,194.64 = 12,448.84 : x
  2. Step 2: Convert to fraction form
    21,879.67/30,194.64 = 12,448.84/x
  3. Step 3: Cross multiply
    21,879.67x = 30,194.64 × 12,448.84
  4. Step 4: Simplify right side
    21,879.67x = 375,888,242.22
  5. Step 5: Solve for x
    x = 375,888,242.22/21,879.67
  6. Step 6: Final answer
    x = 17,179.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.