Home / 20,914.31-31,365.32-6,119.72

Finding the Fourth Proportional to 20,914.31, 31,365.32 and 6,119.72

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Solution

The fourth proportional to 20,914.31, 31,365.32 and 6,119.72 is: 9,177.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.31 : 31,365.32 = 6,119.72 : x
  2. Step 2: Convert to fraction form
    20,914.31/31,365.32 = 6,119.72/x
  3. Step 3: Cross multiply
    20,914.31x = 31,365.32 × 6,119.72
  4. Step 4: Simplify right side
    20,914.31x = 191,946,906.31
  5. Step 5: Solve for x
    x = 191,946,906.31/20,914.31
  6. Step 6: Final answer
    x = 9,177.78

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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.