Home / 20,789.39-28,692.86-11,835.65

Finding the Fourth Proportional to 20,789.39, 28,692.86 and 11,835.65

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Solution

The fourth proportional to 20,789.39, 28,692.86 and 11,835.65 is: 16,335.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.39 : 28,692.86 = 11,835.65 : x
  2. Step 2: Convert to fraction form
    20,789.39/28,692.86 = 11,835.65/x
  3. Step 3: Cross multiply
    20,789.39x = 28,692.86 × 11,835.65
  4. Step 4: Simplify right side
    20,789.39x = 339,598,661.01
  5. Step 5: Solve for x
    x = 339,598,661.01/20,789.39
  6. Step 6: Final answer
    x = 16,335.19

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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.