Home / 13,880.72-20,821.20-5,561.48

Finding the Fourth Proportional to 13,880.72, 20,821.20 and 5,561.48

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Solution

The fourth proportional to 13,880.72, 20,821.20 and 5,561.48 is: 8,342.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.72 : 20,821.20 = 5,561.48 : x
  2. Step 2: Convert to fraction form
    13,880.72/20,821.20 = 5,561.48/x
  3. Step 3: Cross multiply
    13,880.72x = 20,821.20 × 5,561.48
  4. Step 4: Simplify right side
    13,880.72x = 115,796,687.38
  5. Step 5: Solve for x
    x = 115,796,687.38/13,880.72
  6. Step 6: Final answer
    x = 8,342.27

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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.