Home / 13,721.28-20,578.83-8,176.20

Finding the Fourth Proportional to 13,721.28, 20,578.83 and 8,176.20

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Solution

The fourth proportional to 13,721.28, 20,578.83 and 8,176.20 is: 12,262.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.28 : 20,578.83 = 8,176.20 : x
  2. Step 2: Convert to fraction form
    13,721.28/20,578.83 = 8,176.20/x
  3. Step 3: Cross multiply
    13,721.28x = 20,578.83 × 8,176.20
  4. Step 4: Simplify right side
    13,721.28x = 168,256,629.85
  5. Step 5: Solve for x
    x = 168,256,629.85/13,721.28
  6. Step 6: Final answer
    x = 12,262.46

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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.