Home / 20,318.08-30,485.22-7,171.78

Finding the Fourth Proportional to 20,318.08, 30,485.22 and 7,171.78

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Solution

The fourth proportional to 20,318.08, 30,485.22 and 7,171.78 is: 10,760.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.08 : 30,485.22 = 7,171.78 : x
  2. Step 2: Convert to fraction form
    20,318.08/30,485.22 = 7,171.78/x
  3. Step 3: Cross multiply
    20,318.08x = 30,485.22 × 7,171.78
  4. Step 4: Simplify right side
    20,318.08x = 218,633,291.09
  5. Step 5: Solve for x
    x = 218,633,291.09/20,318.08
  6. Step 6: Final answer
    x = 10,760.53

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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.