Home / 20,425.94-28,190.63-11,474.12

Finding the Fourth Proportional to 20,425.94, 28,190.63 and 11,474.12

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Solution

The fourth proportional to 20,425.94, 28,190.63 and 11,474.12 is: 15,835.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.94 : 28,190.63 = 11,474.12 : x
  2. Step 2: Convert to fraction form
    20,425.94/28,190.63 = 11,474.12/x
  3. Step 3: Cross multiply
    20,425.94x = 28,190.63 × 11,474.12
  4. Step 4: Simplify right side
    20,425.94x = 323,462,770.66
  5. Step 5: Solve for x
    x = 323,462,770.66/20,425.94
  6. Step 6: Final answer
    x = 15,835.88

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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.