Home / 31,849.20-47,795.40-20,728.80

Finding the Fourth Proportional to 31,849.20, 47,795.40 and 20,728.80

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Solution

The fourth proportional to 31,849.20, 47,795.40 and 20,728.80 is: 31,107.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,849.20 : 47,795.40 = 20,728.80 : x
  2. Step 2: Convert to fraction form
    31,849.20/47,795.40 = 20,728.80/x
  3. Step 3: Cross multiply
    31,849.20x = 47,795.40 × 20,728.80
  4. Step 4: Simplify right side
    31,849.20x = 990,741,287.52
  5. Step 5: Solve for x
    x = 990,741,287.52/31,849.20
  6. Step 6: Final answer
    x = 31,107.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.