Home / 20,825.09-28,739.34-11,393.65

Finding the Fourth Proportional to 20,825.09, 28,739.34 and 11,393.65

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Solution

The fourth proportional to 20,825.09, 28,739.34 and 11,393.65 is: 15,723.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.09 : 28,739.34 = 11,393.65 : x
  2. Step 2: Convert to fraction form
    20,825.09/28,739.34 = 11,393.65/x
  3. Step 3: Cross multiply
    20,825.09x = 28,739.34 × 11,393.65
  4. Step 4: Simplify right side
    20,825.09x = 327,446,017.12
  5. Step 5: Solve for x
    x = 327,446,017.12/20,825.09
  6. Step 6: Final answer
    x = 15,723.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.