Home / 13,928.29-20,858.35-12,578.92

Finding the Fourth Proportional to 13,928.29, 20,858.35 and 12,578.92

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Solution

The fourth proportional to 13,928.29, 20,858.35 and 12,578.92 is: 18,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.29 : 20,858.35 = 12,578.92 : x
  2. Step 2: Convert to fraction form
    13,928.29/20,858.35 = 12,578.92/x
  3. Step 3: Cross multiply
    13,928.29x = 20,858.35 × 12,578.92
  4. Step 4: Simplify right side
    13,928.29x = 262,375,455.97
  5. Step 5: Solve for x
    x = 262,375,455.97/13,928.29
  6. Step 6: Final answer
    x = 18,837.60

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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.