Home / 13,121.28-19,680.24-3,886.56

Finding the Fourth Proportional to 13,121.28, 19,680.24 and 3,886.56

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Solution

The fourth proportional to 13,121.28, 19,680.24 and 3,886.56 is: 5,829.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.28 : 19,680.24 = 3,886.56 : x
  2. Step 2: Convert to fraction form
    13,121.28/19,680.24 = 3,886.56/x
  3. Step 3: Cross multiply
    13,121.28x = 19,680.24 × 3,886.56
  4. Step 4: Simplify right side
    13,121.28x = 76,488,433.57
  5. Step 5: Solve for x
    x = 76,488,433.57/13,121.28
  6. Step 6: Final answer
    x = 5,829.34

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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.