Home / 28,039.75-42,067.57-11,411.72

Finding the Fourth Proportional to 28,039.75, 42,067.57 and 11,411.72

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Solution

The fourth proportional to 28,039.75, 42,067.57 and 11,411.72 is: 17,120.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,039.75 : 42,067.57 = 11,411.72 : x
  2. Step 2: Convert to fraction form
    28,039.75/42,067.57 = 11,411.72/x
  3. Step 3: Cross multiply
    28,039.75x = 42,067.57 × 11,411.72
  4. Step 4: Simplify right side
    28,039.75x = 480,063,151.89
  5. Step 5: Solve for x
    x = 480,063,151.89/28,039.75
  6. Step 6: Final answer
    x = 17,120.81

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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.