Home / 31,687.78-47,524.94-20,409.34

Finding the Fourth Proportional to 31,687.78, 47,524.94 and 20,409.34

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Solution

The fourth proportional to 31,687.78, 47,524.94 and 20,409.34 is: 30,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,687.78 : 47,524.94 = 20,409.34 : x
  2. Step 2: Convert to fraction form
    31,687.78/47,524.94 = 20,409.34/x
  3. Step 3: Cross multiply
    31,687.78x = 47,524.94 × 20,409.34
  4. Step 4: Simplify right side
    31,687.78x = 969,952,658.94
  5. Step 5: Solve for x
    x = 969,952,658.94/31,687.78
  6. Step 6: Final answer
    x = 30,609.68

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1.5x scale

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.