Home / 20,858.75-28,761.99-13,293.09

Finding the Fourth Proportional to 20,858.75, 28,761.99 and 13,293.09

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Solution

The fourth proportional to 20,858.75, 28,761.99 and 13,293.09 is: 18,329.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.75 : 28,761.99 = 13,293.09 : x
  2. Step 2: Convert to fraction form
    20,858.75/28,761.99 = 13,293.09/x
  3. Step 3: Cross multiply
    20,858.75x = 28,761.99 × 13,293.09
  4. Step 4: Simplify right side
    20,858.75x = 382,335,721.65
  5. Step 5: Solve for x
    x = 382,335,721.65/20,858.75
  6. Step 6: Final answer
    x = 18,329.76

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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.