Home / 31,990.54-44,138.09-20,660.51

Finding the Fourth Proportional to 31,990.54, 44,138.09 and 20,660.51

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Solution

The fourth proportional to 31,990.54, 44,138.09 and 20,660.51 is: 28,505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.54 : 44,138.09 = 20,660.51 : x
  2. Step 2: Convert to fraction form
    31,990.54/44,138.09 = 20,660.51/x
  3. Step 3: Cross multiply
    31,990.54x = 44,138.09 × 20,660.51
  4. Step 4: Simplify right side
    31,990.54x = 911,915,456.87
  5. Step 5: Solve for x
    x = 911,915,456.87/31,990.54
  6. Step 6: Final answer
    x = 28,505.78

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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.