Home / 28,268.76-38,961.90-21,182.88

Finding the Fourth Proportional to 28,268.76, 38,961.90 and 21,182.88

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Solution

The fourth proportional to 28,268.76, 38,961.90 and 21,182.88 is: 29,195.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,268.76 : 38,961.90 = 21,182.88 : x
  2. Step 2: Convert to fraction form
    28,268.76/38,961.90 = 21,182.88/x
  3. Step 3: Cross multiply
    28,268.76x = 38,961.90 × 21,182.88
  4. Step 4: Simplify right side
    28,268.76x = 825,325,252.27
  5. Step 5: Solve for x
    x = 825,325,252.27/28,268.76
  6. Step 6: Final answer
    x = 29,195.67

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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.