Home / 20,910.20-31,331.70-11,036.60

Finding the Fourth Proportional to 20,910.20, 31,331.70 and 11,036.60

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Solution

The fourth proportional to 20,910.20, 31,331.70 and 11,036.60 is: 16,537.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.20 : 31,331.70 = 11,036.60 : x
  2. Step 2: Convert to fraction form
    20,910.20/31,331.70 = 11,036.60/x
  3. Step 3: Cross multiply
    20,910.20x = 31,331.70 × 11,036.60
  4. Step 4: Simplify right side
    20,910.20x = 345,795,440.22
  5. Step 5: Solve for x
    x = 345,795,440.22/20,910.20
  6. Step 6: Final answer
    x = 16,537.17

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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.