Home / 21,976.82-30,328.07-11,905.23

Finding the Fourth Proportional to 21,976.82, 30,328.07 and 11,905.23

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Solution

The fourth proportional to 21,976.82, 30,328.07 and 11,905.23 is: 16,429.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.82 : 30,328.07 = 11,905.23 : x
  2. Step 2: Convert to fraction form
    21,976.82/30,328.07 = 11,905.23/x
  3. Step 3: Cross multiply
    21,976.82x = 30,328.07 × 11,905.23
  4. Step 4: Simplify right side
    21,976.82x = 361,062,648.81
  5. Step 5: Solve for x
    x = 361,062,648.81/21,976.82
  6. Step 6: Final answer
    x = 16,429.25

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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.