Home / 31,782.38-43,905.42-25,400.78

Finding the Fourth Proportional to 31,782.38, 43,905.42 and 25,400.78

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Solution

The fourth proportional to 31,782.38, 43,905.42 and 25,400.78 is: 35,089.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,782.38 : 43,905.42 = 25,400.78 : x
  2. Step 2: Convert to fraction form
    31,782.38/43,905.42 = 25,400.78/x
  3. Step 3: Cross multiply
    31,782.38x = 43,905.42 × 25,400.78
  4. Step 4: Simplify right side
    31,782.38x = 1,115,231,694.70
  5. Step 5: Solve for x
    x = 1,115,231,694.70/31,782.38
  6. Step 6: Final answer
    x = 35,089.63

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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.