Home / 20,939.96-31,409.45-5,144.97

Finding the Fourth Proportional to 20,939.96, 31,409.45 and 5,144.97

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Solution

The fourth proportional to 20,939.96, 31,409.45 and 5,144.97 is: 7,717.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.96 : 31,409.45 = 5,144.97 : x
  2. Step 2: Convert to fraction form
    20,939.96/31,409.45 = 5,144.97/x
  3. Step 3: Cross multiply
    20,939.96x = 31,409.45 × 5,144.97
  4. Step 4: Simplify right side
    20,939.96x = 161,600,677.97
  5. Step 5: Solve for x
    x = 161,600,677.97/20,939.96
  6. Step 6: Final answer
    x = 7,717.33

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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.