Home / 20,945.72-31,410.38-7,790.92

Finding the Fourth Proportional to 20,945.72, 31,410.38 and 7,790.92

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Solution

The fourth proportional to 20,945.72, 31,410.38 and 7,790.92 is: 11,683.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.72 : 31,410.38 = 7,790.92 : x
  2. Step 2: Convert to fraction form
    20,945.72/31,410.38 = 7,790.92/x
  3. Step 3: Cross multiply
    20,945.72x = 31,410.38 × 7,790.92
  4. Step 4: Simplify right side
    20,945.72x = 244,715,698.70
  5. Step 5: Solve for x
    x = 244,715,698.70/20,945.72
  6. Step 6: Final answer
    x = 11,683.33

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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.