Home / 31,372.54-47,074.94-20,849.78

Finding the Fourth Proportional to 31,372.54, 47,074.94 and 20,849.78

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Solution

The fourth proportional to 31,372.54, 47,074.94 and 20,849.78 is: 31,285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,372.54 : 47,074.94 = 20,849.78 : x
  2. Step 2: Convert to fraction form
    31,372.54/47,074.94 = 20,849.78/x
  3. Step 3: Cross multiply
    31,372.54x = 47,074.94 × 20,849.78
  4. Step 4: Simplify right side
    31,372.54x = 981,502,142.51
  5. Step 5: Solve for x
    x = 981,502,142.51/31,372.54
  6. Step 6: Final answer
    x = 31,285.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.