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Finding the Fourth Proportional to 12,750.92, 19,067.66 and 12,128.84

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Solution

The fourth proportional to 12,750.92, 19,067.66 and 12,128.84 is: 18,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.92 : 19,067.66 = 12,128.84 : x
  2. Step 2: Convert to fraction form
    12,750.92/19,067.66 = 12,128.84/x
  3. Step 3: Cross multiply
    12,750.92x = 19,067.66 × 12,128.84
  4. Step 4: Simplify right side
    12,750.92x = 231,268,597.31
  5. Step 5: Solve for x
    x = 231,268,597.31/12,750.92
  6. Step 6: Final answer
    x = 18,137.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.