Home / 31,722.14-43,751.30-20,392.80

Finding the Fourth Proportional to 31,722.14, 43,751.30 and 20,392.80

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Solution

The fourth proportional to 31,722.14, 43,751.30 and 20,392.80 is: 28,125.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,722.14 : 43,751.30 = 20,392.80 : x
  2. Step 2: Convert to fraction form
    31,722.14/43,751.30 = 20,392.80/x
  3. Step 3: Cross multiply
    31,722.14x = 43,751.30 × 20,392.80
  4. Step 4: Simplify right side
    31,722.14x = 892,211,510.64
  5. Step 5: Solve for x
    x = 892,211,510.64/31,722.14
  6. Step 6: Final answer
    x = 28,125.83

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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.