Home / 13,629.28-20,451.76-5,315.04

Finding the Fourth Proportional to 13,629.28, 20,451.76 and 5,315.04

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Solution

The fourth proportional to 13,629.28, 20,451.76 and 5,315.04 is: 7,975.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.28 : 20,451.76 = 5,315.04 : x
  2. Step 2: Convert to fraction form
    13,629.28/20,451.76 = 5,315.04/x
  3. Step 3: Cross multiply
    13,629.28x = 20,451.76 × 5,315.04
  4. Step 4: Simplify right side
    13,629.28x = 108,701,922.47
  5. Step 5: Solve for x
    x = 108,701,922.47/13,629.28
  6. Step 6: Final answer
    x = 7,975.62

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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.