Home / 31,991.88-47,889.37-20,874.63

Finding the Fourth Proportional to 31,991.88, 47,889.37 and 20,874.63

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Solution

The fourth proportional to 31,991.88, 47,889.37 and 20,874.63 is: 31,247.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,991.88 : 47,889.37 = 20,874.63 : x
  2. Step 2: Convert to fraction form
    31,991.88/47,889.37 = 20,874.63/x
  3. Step 3: Cross multiply
    31,991.88x = 47,889.37 × 20,874.63
  4. Step 4: Simplify right side
    31,991.88x = 999,672,879.68
  5. Step 5: Solve for x
    x = 999,672,879.68/31,991.88
  6. Step 6: Final answer
    x = 31,247.71

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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.