Home / 20,280.30-27,990.03-11,896.80

Finding the Fourth Proportional to 20,280.30, 27,990.03 and 11,896.80

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Solution

The fourth proportional to 20,280.30, 27,990.03 and 11,896.80 is: 16,419.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.30 : 27,990.03 = 11,896.80 : x
  2. Step 2: Convert to fraction form
    20,280.30/27,990.03 = 11,896.80/x
  3. Step 3: Cross multiply
    20,280.30x = 27,990.03 × 11,896.80
  4. Step 4: Simplify right side
    20,280.30x = 332,991,788.90
  5. Step 5: Solve for x
    x = 332,991,788.90/20,280.30
  6. Step 6: Final answer
    x = 16,419.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.