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Finding the Fourth Proportional to 28,067.88, 38,746.28 and 18,513.40

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Solution

The fourth proportional to 28,067.88, 38,746.28 and 18,513.40 is: 25,556.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,067.88 : 38,746.28 = 18,513.40 : x
  2. Step 2: Convert to fraction form
    28,067.88/38,746.28 = 18,513.40/x
  3. Step 3: Cross multiply
    28,067.88x = 38,746.28 × 18,513.40
  4. Step 4: Simplify right side
    28,067.88x = 717,325,380.15
  5. Step 5: Solve for x
    x = 717,325,380.15/28,067.88
  6. Step 6: Final answer
    x = 25,556.81

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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.