Home / 13,721.79-20,582.59-3,861

Finding the Fourth Proportional to 13,721.79, 20,582.59 and 3,861

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Solution

The fourth proportional to 13,721.79, 20,582.59 and 3,861 is: 5,791.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.79 : 20,582.59 = 3,861 : x
  2. Step 2: Convert to fraction form
    13,721.79/20,582.59 = 3,861/x
  3. Step 3: Cross multiply
    13,721.79x = 20,582.59 × 3,861
  4. Step 4: Simplify right side
    13,721.79x = 79,469,379.99
  5. Step 5: Solve for x
    x = 79,469,379.99/13,721.79
  6. Step 6: Final answer
    x = 5,791.47

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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.