Home / 13,418.28-20,128.79-3,557.56

Finding the Fourth Proportional to 13,418.28, 20,128.79 and 3,557.56

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Solution

The fourth proportional to 13,418.28, 20,128.79 and 3,557.56 is: 5,336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.28 : 20,128.79 = 3,557.56 : x
  2. Step 2: Convert to fraction form
    13,418.28/20,128.79 = 3,557.56/x
  3. Step 3: Cross multiply
    13,418.28x = 20,128.79 × 3,557.56
  4. Step 4: Simplify right side
    13,418.28x = 71,609,336.72
  5. Step 5: Solve for x
    x = 71,609,336.72/13,418.28
  6. Step 6: Final answer
    x = 5,336.70

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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.