Home / 38,121.88-57,168.78-13,155.56

Finding the Fourth Proportional to 38,121.88, 57,168.78 and 13,155.56

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Solution

The fourth proportional to 38,121.88, 57,168.78 and 13,155.56 is: 19,728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,121.88 : 57,168.78 = 13,155.56 : x
  2. Step 2: Convert to fraction form
    38,121.88/57,168.78 = 13,155.56/x
  3. Step 3: Cross multiply
    38,121.88x = 57,168.78 × 13,155.56
  4. Step 4: Simplify right side
    38,121.88x = 752,087,315.42
  5. Step 5: Solve for x
    x = 752,087,315.42/38,121.88
  6. Step 6: Final answer
    x = 19,728.49

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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.