Home / 31,490.97-43,383.60-21,914.40

Finding the Fourth Proportional to 31,490.97, 43,383.60 and 21,914.40

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Solution

The fourth proportional to 31,490.97, 43,383.60 and 21,914.40 is: 30,190.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,490.97 : 43,383.60 = 21,914.40 : x
  2. Step 2: Convert to fraction form
    31,490.97/43,383.60 = 21,914.40/x
  3. Step 3: Cross multiply
    31,490.97x = 43,383.60 × 21,914.40
  4. Step 4: Simplify right side
    31,490.97x = 950,725,563.84
  5. Step 5: Solve for x
    x = 950,725,563.84/31,490.97
  6. Step 6: Final answer
    x = 30,190.42

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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.