Home / 18,954.50-28,431.41-7,861.19

Finding the Fourth Proportional to 18,954.50, 28,431.41 and 7,861.19

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Solution

The fourth proportional to 18,954.50, 28,431.41 and 7,861.19 is: 11,791.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.50 : 28,431.41 = 7,861.19 : x
  2. Step 2: Convert to fraction form
    18,954.50/28,431.41 = 7,861.19/x
  3. Step 3: Cross multiply
    18,954.50x = 28,431.41 × 7,861.19
  4. Step 4: Simplify right side
    18,954.50x = 223,504,534.51
  5. Step 5: Solve for x
    x = 223,504,534.51/18,954.50
  6. Step 6: Final answer
    x = 11,791.64

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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.