Home / 20,945.05-31,421.46-6,906.06

Finding the Fourth Proportional to 20,945.05, 31,421.46 and 6,906.06

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Solution

The fourth proportional to 20,945.05, 31,421.46 and 6,906.06 is: 10,360.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.05 : 31,421.46 = 6,906.06 : x
  2. Step 2: Convert to fraction form
    20,945.05/31,421.46 = 6,906.06/x
  3. Step 3: Cross multiply
    20,945.05x = 31,421.46 × 6,906.06
  4. Step 4: Simplify right side
    20,945.05x = 216,998,488.05
  5. Step 5: Solve for x
    x = 216,998,488.05/20,945.05
  6. Step 6: Final answer
    x = 10,360.37

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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.