Home / 31,690.44-43,725.42-18,947.76

Finding the Fourth Proportional to 31,690.44, 43,725.42 and 18,947.76

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Solution

The fourth proportional to 31,690.44, 43,725.42 and 18,947.76 is: 26,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.44 : 43,725.42 = 18,947.76 : x
  2. Step 2: Convert to fraction form
    31,690.44/43,725.42 = 18,947.76/x
  3. Step 3: Cross multiply
    31,690.44x = 43,725.42 × 18,947.76
  4. Step 4: Simplify right side
    31,690.44x = 828,498,764.06
  5. Step 5: Solve for x
    x = 828,498,764.06/31,690.44
  6. Step 6: Final answer
    x = 26,143.49

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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.