Home / 13,721.36-20,583.25-3,860.72

Finding the Fourth Proportional to 13,721.36, 20,583.25 and 3,860.72

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Solution

The fourth proportional to 13,721.36, 20,583.25 and 3,860.72 is: 5,791.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.36 : 20,583.25 = 3,860.72 : x
  2. Step 2: Convert to fraction form
    13,721.36/20,583.25 = 3,860.72/x
  3. Step 3: Cross multiply
    13,721.36x = 20,583.25 × 3,860.72
  4. Step 4: Simplify right side
    13,721.36x = 79,466,164.94
  5. Step 5: Solve for x
    x = 79,466,164.94/13,721.36
  6. Step 6: Final answer
    x = 5,791.42

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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.