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Finding the Fourth Proportional to 33,993.66, 46,918 and 21,721.22

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Solution

The fourth proportional to 33,993.66, 46,918 and 21,721.22 is: 29,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,993.66 : 46,918 = 21,721.22 : x
  2. Step 2: Convert to fraction form
    33,993.66/46,918 = 21,721.22/x
  3. Step 3: Cross multiply
    33,993.66x = 46,918 × 21,721.22
  4. Step 4: Simplify right side
    33,993.66x = 1,019,116,199.96
  5. Step 5: Solve for x
    x = 1,019,116,199.96/33,993.66
  6. Step 6: Final answer
    x = 29,979.60

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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.