Home / 20,811.32-31,221.66-10,955.24

Finding the Fourth Proportional to 20,811.32, 31,221.66 and 10,955.24

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Solution

The fourth proportional to 20,811.32, 31,221.66 and 10,955.24 is: 16,435.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.32 : 31,221.66 = 10,955.24 : x
  2. Step 2: Convert to fraction form
    20,811.32/31,221.66 = 10,955.24/x
  3. Step 3: Cross multiply
    20,811.32x = 31,221.66 × 10,955.24
  4. Step 4: Simplify right side
    20,811.32x = 342,040,778.50
  5. Step 5: Solve for x
    x = 342,040,778.50/20,811.32
  6. Step 6: Final answer
    x = 16,435.32

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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.