Home / 31,789.50-43,839-19,040.64

Finding the Fourth Proportional to 31,789.50, 43,839 and 19,040.64

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Solution

The fourth proportional to 31,789.50, 43,839 and 19,040.64 is: 26,257.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,789.50 : 43,839 = 19,040.64 : x
  2. Step 2: Convert to fraction form
    31,789.50/43,839 = 19,040.64/x
  3. Step 3: Cross multiply
    31,789.50x = 43,839 × 19,040.64
  4. Step 4: Simplify right side
    31,789.50x = 834,722,616.96
  5. Step 5: Solve for x
    x = 834,722,616.96/31,789.50
  6. Step 6: Final answer
    x = 26,257.81

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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.