Home / 11,278.50-16,920.26-3,380.70

Finding the Fourth Proportional to 11,278.50, 16,920.26 and 3,380.70

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Solution

The fourth proportional to 11,278.50, 16,920.26 and 3,380.70 is: 5,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.50 : 16,920.26 = 3,380.70 : x
  2. Step 2: Convert to fraction form
    11,278.50/16,920.26 = 3,380.70/x
  3. Step 3: Cross multiply
    11,278.50x = 16,920.26 × 3,380.70
  4. Step 4: Simplify right side
    11,278.50x = 57,202,306.08
  5. Step 5: Solve for x
    x = 57,202,306.08/11,278.50
  6. Step 6: Final answer
    x = 5,071.80

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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.