Home / 20,906.89-31,365.49-10,381.85

Finding the Fourth Proportional to 20,906.89, 31,365.49 and 10,381.85

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Solution

The fourth proportional to 20,906.89, 31,365.49 and 10,381.85 is: 15,575.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.89 : 31,365.49 = 10,381.85 : x
  2. Step 2: Convert to fraction form
    20,906.89/31,365.49 = 10,381.85/x
  3. Step 3: Cross multiply
    20,906.89x = 31,365.49 × 10,381.85
  4. Step 4: Simplify right side
    20,906.89x = 325,631,812.36
  5. Step 5: Solve for x
    x = 325,631,812.36/20,906.89
  6. Step 6: Final answer
    x = 15,575.33

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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.