Home / 28,268.88-39,011.40-15,694.80

Finding the Fourth Proportional to 28,268.88, 39,011.40 and 15,694.80

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Solution

The fourth proportional to 28,268.88, 39,011.40 and 15,694.80 is: 21,659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,268.88 : 39,011.40 = 15,694.80 : x
  2. Step 2: Convert to fraction form
    28,268.88/39,011.40 = 15,694.80/x
  3. Step 3: Cross multiply
    28,268.88x = 39,011.40 × 15,694.80
  4. Step 4: Simplify right side
    28,268.88x = 612,276,120.72
  5. Step 5: Solve for x
    x = 612,276,120.72/28,268.88
  6. Step 6: Final answer
    x = 21,659.02

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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.