Home / 9,121.28-13,687.39-3,278.35

Finding the Fourth Proportional to 9,121.28, 13,687.39 and 3,278.35

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Solution

The fourth proportional to 9,121.28, 13,687.39 and 3,278.35 is: 4,919.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.28 : 13,687.39 = 3,278.35 : x
  2. Step 2: Convert to fraction form
    9,121.28/13,687.39 = 3,278.35/x
  3. Step 3: Cross multiply
    9,121.28x = 13,687.39 × 3,278.35
  4. Step 4: Simplify right side
    9,121.28x = 44,872,055.01
  5. Step 5: Solve for x
    x = 44,872,055.01/9,121.28
  6. Step 6: Final answer
    x = 4,919.49

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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.