Home / 20,825.15-28,739.12-11,393.91

Finding the Fourth Proportional to 20,825.15, 28,739.12 and 11,393.91

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Solution

The fourth proportional to 20,825.15, 28,739.12 and 11,393.91 is: 15,723.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.15 : 28,739.12 = 11,393.91 : x
  2. Step 2: Convert to fraction form
    20,825.15/28,739.12 = 11,393.91/x
  3. Step 3: Cross multiply
    20,825.15x = 28,739.12 × 11,393.91
  4. Step 4: Simplify right side
    20,825.15x = 327,450,889.79
  5. Step 5: Solve for x
    x = 327,450,889.79/20,825.15
  6. Step 6: Final answer
    x = 15,723.82

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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.