Home / 20,922.51-31,377.09-6,879.30

Finding the Fourth Proportional to 20,922.51, 31,377.09 and 6,879.30

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Solution

The fourth proportional to 20,922.51, 31,377.09 and 6,879.30 is: 10,316.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.51 : 31,377.09 = 6,879.30 : x
  2. Step 2: Convert to fraction form
    20,922.51/31,377.09 = 6,879.30/x
  3. Step 3: Cross multiply
    20,922.51x = 31,377.09 × 6,879.30
  4. Step 4: Simplify right side
    20,922.51x = 215,852,415.24
  5. Step 5: Solve for x
    x = 215,852,415.24/20,922.51
  6. Step 6: Final answer
    x = 10,316.76

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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.