Home / 28,365.68-39,198.59-21,279.80

Finding the Fourth Proportional to 28,365.68, 39,198.59 and 21,279.80

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Solution

The fourth proportional to 28,365.68, 39,198.59 and 21,279.80 is: 29,406.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.68 : 39,198.59 = 21,279.80 : x
  2. Step 2: Convert to fraction form
    28,365.68/39,198.59 = 21,279.80/x
  3. Step 3: Cross multiply
    28,365.68x = 39,198.59 × 21,279.80
  4. Step 4: Simplify right side
    28,365.68x = 834,137,853.09
  5. Step 5: Solve for x
    x = 834,137,853.09/28,365.68
  6. Step 6: Final answer
    x = 29,406.59

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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.