Home / 20,379.52-28,125.98-11,427.88

Finding the Fourth Proportional to 20,379.52, 28,125.98 and 11,427.88

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Solution

The fourth proportional to 20,379.52, 28,125.98 and 11,427.88 is: 15,771.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.52 : 28,125.98 = 11,427.88 : x
  2. Step 2: Convert to fraction form
    20,379.52/28,125.98 = 11,427.88/x
  3. Step 3: Cross multiply
    20,379.52x = 28,125.98 × 11,427.88
  4. Step 4: Simplify right side
    20,379.52x = 321,420,324.32
  5. Step 5: Solve for x
    x = 321,420,324.32/20,379.52
  6. Step 6: Final answer
    x = 15,771.73

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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.