Home / 28,571.07-42,863.40-11,921.85

Finding the Fourth Proportional to 28,571.07, 42,863.40 and 11,921.85

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Solution

The fourth proportional to 28,571.07, 42,863.40 and 11,921.85 is: 17,885.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.07 : 42,863.40 = 11,921.85 : x
  2. Step 2: Convert to fraction form
    28,571.07/42,863.40 = 11,921.85/x
  3. Step 3: Cross multiply
    28,571.07x = 42,863.40 × 11,921.85
  4. Step 4: Simplify right side
    28,571.07x = 511,011,025.29
  5. Step 5: Solve for x
    x = 511,011,025.29/28,571.07
  6. Step 6: Final answer
    x = 17,885.61

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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.