Home / 20,284.85-27,990.32-11,331.24

Finding the Fourth Proportional to 20,284.85, 27,990.32 and 11,331.24

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Solution

The fourth proportional to 20,284.85, 27,990.32 and 11,331.24 is: 15,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,284.85 : 27,990.32 = 11,331.24 : x
  2. Step 2: Convert to fraction form
    20,284.85/27,990.32 = 11,331.24/x
  3. Step 3: Cross multiply
    20,284.85x = 27,990.32 × 11,331.24
  4. Step 4: Simplify right side
    20,284.85x = 317,164,976.94
  5. Step 5: Solve for x
    x = 317,164,976.94/20,284.85
  6. Step 6: Final answer
    x = 15,635.56

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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.