Home / 20,660.12-30,914.84-19,091.96

Finding the Fourth Proportional to 20,660.12, 30,914.84 and 19,091.96

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Solution

The fourth proportional to 20,660.12, 30,914.84 and 19,091.96 is: 28,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.12 : 30,914.84 = 19,091.96 : x
  2. Step 2: Convert to fraction form
    20,660.12/30,914.84 = 19,091.96/x
  3. Step 3: Cross multiply
    20,660.12x = 30,914.84 × 19,091.96
  4. Step 4: Simplify right side
    20,660.12x = 590,224,888.69
  5. Step 5: Solve for x
    x = 590,224,888.69/20,660.12
  6. Step 6: Final answer
    x = 28,568.32

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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.