Home / 31,990.92-44,138.60-20,660.89

Finding the Fourth Proportional to 31,990.92, 44,138.60 and 20,660.89

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Solution

The fourth proportional to 31,990.92, 44,138.60 and 20,660.89 is: 28,506.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.92 : 44,138.60 = 20,660.89 : x
  2. Step 2: Convert to fraction form
    31,990.92/44,138.60 = 20,660.89/x
  3. Step 3: Cross multiply
    31,990.92x = 44,138.60 × 20,660.89
  4. Step 4: Simplify right side
    31,990.92x = 911,942,759.35
  5. Step 5: Solve for x
    x = 911,942,759.35/31,990.92
  6. Step 6: Final answer
    x = 28,506.30

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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.