Home / 20,147.09-30,212.79-6,816.51

Finding the Fourth Proportional to 20,147.09, 30,212.79 and 6,816.51

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Solution

The fourth proportional to 20,147.09, 30,212.79 and 6,816.51 is: 10,222.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.09 : 30,212.79 = 6,816.51 : x
  2. Step 2: Convert to fraction form
    20,147.09/30,212.79 = 6,816.51/x
  3. Step 3: Cross multiply
    20,147.09x = 30,212.79 × 6,816.51
  4. Step 4: Simplify right side
    20,147.09x = 205,945,785.16
  5. Step 5: Solve for x
    x = 205,945,785.16/20,147.09
  6. Step 6: Final answer
    x = 10,222.11

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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.