Home / 20,187.36-30,242.88-11,428.56

Finding the Fourth Proportional to 20,187.36, 30,242.88 and 11,428.56

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Solution

The fourth proportional to 20,187.36, 30,242.88 and 11,428.56 is: 17,121.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.36 : 30,242.88 = 11,428.56 : x
  2. Step 2: Convert to fraction form
    20,187.36/30,242.88 = 11,428.56/x
  3. Step 3: Cross multiply
    20,187.36x = 30,242.88 × 11,428.56
  4. Step 4: Simplify right side
    20,187.36x = 345,632,568.65
  5. Step 5: Solve for x
    x = 345,632,568.65/20,187.36
  6. Step 6: Final answer
    x = 17,121.24

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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.