Home / 31,383.50-43,313.07-18,135.50

Finding the Fourth Proportional to 31,383.50, 43,313.07 and 18,135.50

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Solution

The fourth proportional to 31,383.50, 43,313.07 and 18,135.50 is: 25,029.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,383.50 : 43,313.07 = 18,135.50 : x
  2. Step 2: Convert to fraction form
    31,383.50/43,313.07 = 18,135.50/x
  3. Step 3: Cross multiply
    31,383.50x = 43,313.07 × 18,135.50
  4. Step 4: Simplify right side
    31,383.50x = 785,504,180.99
  5. Step 5: Solve for x
    x = 785,504,180.99/31,383.50
  6. Step 6: Final answer
    x = 25,029.21

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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.