Home / 31,680.81-43,707.06-20,348.73

Finding the Fourth Proportional to 31,680.81, 43,707.06 and 20,348.73

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Solution

The fourth proportional to 31,680.81, 43,707.06 and 20,348.73 is: 28,073.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.81 : 43,707.06 = 20,348.73 : x
  2. Step 2: Convert to fraction form
    31,680.81/43,707.06 = 20,348.73/x
  3. Step 3: Cross multiply
    31,680.81x = 43,707.06 × 20,348.73
  4. Step 4: Simplify right side
    31,680.81x = 889,383,163.03
  5. Step 5: Solve for x
    x = 889,383,163.03/31,680.81
  6. Step 6: Final answer
    x = 28,073.25

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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.