Home / 20,584.12-28,415.88-13,789.84

Finding the Fourth Proportional to 20,584.12, 28,415.88 and 13,789.84

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Solution

The fourth proportional to 20,584.12, 28,415.88 and 13,789.84 is: 19,036.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.12 : 28,415.88 = 13,789.84 : x
  2. Step 2: Convert to fraction form
    20,584.12/28,415.88 = 13,789.84/x
  3. Step 3: Cross multiply
    20,584.12x = 28,415.88 × 13,789.84
  4. Step 4: Simplify right side
    20,584.12x = 391,850,438.66
  5. Step 5: Solve for x
    x = 391,850,438.66/20,584.12
  6. Step 6: Final answer
    x = 19,036.54

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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.