Home / 31,451.56-43,356.19-20,822.74

Finding the Fourth Proportional to 31,451.56, 43,356.19 and 20,822.74

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Solution

The fourth proportional to 31,451.56, 43,356.19 and 20,822.74 is: 28,704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.56 : 43,356.19 = 20,822.74 : x
  2. Step 2: Convert to fraction form
    31,451.56/43,356.19 = 20,822.74/x
  3. Step 3: Cross multiply
    31,451.56x = 43,356.19 × 20,822.74
  4. Step 4: Simplify right side
    31,451.56x = 902,794,350.87
  5. Step 5: Solve for x
    x = 902,794,350.87/31,451.56
  6. Step 6: Final answer
    x = 28,704.28

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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.