Home / 31,295.25-43,187.49-18,720

Finding the Fourth Proportional to 31,295.25, 43,187.49 and 18,720

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Solution

The fourth proportional to 31,295.25, 43,187.49 and 18,720 is: 25,833.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,295.25 : 43,187.49 = 18,720 : x
  2. Step 2: Convert to fraction form
    31,295.25/43,187.49 = 18,720/x
  3. Step 3: Cross multiply
    31,295.25x = 43,187.49 × 18,720
  4. Step 4: Simplify right side
    31,295.25x = 808,469,812.80
  5. Step 5: Solve for x
    x = 808,469,812.80/31,295.25
  6. Step 6: Final answer
    x = 25,833.63

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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.