Home / 13,209.66-19,815.57-5,418.54

Finding the Fourth Proportional to 13,209.66, 19,815.57 and 5,418.54

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Solution

The fourth proportional to 13,209.66, 19,815.57 and 5,418.54 is: 8,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.66 : 19,815.57 = 5,418.54 : x
  2. Step 2: Convert to fraction form
    13,209.66/19,815.57 = 5,418.54/x
  3. Step 3: Cross multiply
    13,209.66x = 19,815.57 × 5,418.54
  4. Step 4: Simplify right side
    13,209.66x = 107,371,458.67
  5. Step 5: Solve for x
    x = 107,371,458.67/13,209.66
  6. Step 6: Final answer
    x = 8,128.25

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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.