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Finding the Fourth Proportional to 31,672.32, 43,708.32 and 18,928.32

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Solution

The fourth proportional to 31,672.32, 43,708.32 and 18,928.32 is: 26,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,672.32 : 43,708.32 = 18,928.32 : x
  2. Step 2: Convert to fraction form
    31,672.32/43,708.32 = 18,928.32/x
  3. Step 3: Cross multiply
    31,672.32x = 43,708.32 × 18,928.32
  4. Step 4: Simplify right side
    31,672.32x = 827,325,067.62
  5. Step 5: Solve for x
    x = 827,325,067.62/31,672.32
  6. Step 6: Final answer
    x = 26,121.39

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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.