Home / 28,979.88-39,992.40-17,043.72

Finding the Fourth Proportional to 28,979.88, 39,992.40 and 17,043.72

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Solution

The fourth proportional to 28,979.88, 39,992.40 and 17,043.72 is: 23,520.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.88 : 39,992.40 = 17,043.72 : x
  2. Step 2: Convert to fraction form
    28,979.88/39,992.40 = 17,043.72/x
  3. Step 3: Cross multiply
    28,979.88x = 39,992.40 × 17,043.72
  4. Step 4: Simplify right side
    28,979.88x = 681,619,267.73
  5. Step 5: Solve for x
    x = 681,619,267.73/28,979.88
  6. Step 6: Final answer
    x = 23,520.43

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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.