Home / 20,912.12-31,362.42-15,019.64

Finding the Fourth Proportional to 20,912.12, 31,362.42 and 15,019.64

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Solution

The fourth proportional to 20,912.12, 31,362.42 and 15,019.64 is: 22,525.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.12 : 31,362.42 = 15,019.64 : x
  2. Step 2: Convert to fraction form
    20,912.12/31,362.42 = 15,019.64/x
  3. Step 3: Cross multiply
    20,912.12x = 31,362.42 × 15,019.64
  4. Step 4: Simplify right side
    20,912.12x = 471,052,257.93
  5. Step 5: Solve for x
    x = 471,052,257.93/20,912.12
  6. Step 6: Final answer
    x = 22,525.32

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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.