Home / 21,170.82-29,215.83-11,739.39

Finding the Fourth Proportional to 21,170.82, 29,215.83 and 11,739.39

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Solution

The fourth proportional to 21,170.82, 29,215.83 and 11,739.39 is: 16,200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.82 : 29,215.83 = 11,739.39 : x
  2. Step 2: Convert to fraction form
    21,170.82/29,215.83 = 11,739.39/x
  3. Step 3: Cross multiply
    21,170.82x = 29,215.83 × 11,739.39
  4. Step 4: Simplify right side
    21,170.82x = 342,976,022.54
  5. Step 5: Solve for x
    x = 342,976,022.54/21,170.82
  6. Step 6: Final answer
    x = 16,200.41

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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.