Home / 7,385.91-11,078.86-2,191.78

Finding the Fourth Proportional to 7,385.91, 11,078.86 and 2,191.78

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Solution

The fourth proportional to 7,385.91, 11,078.86 and 2,191.78 is: 3,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,385.91 : 11,078.86 = 2,191.78 : x
  2. Step 2: Convert to fraction form
    7,385.91/11,078.86 = 2,191.78/x
  3. Step 3: Cross multiply
    7,385.91x = 11,078.86 × 2,191.78
  4. Step 4: Simplify right side
    7,385.91x = 24,282,436.25
  5. Step 5: Solve for x
    x = 24,282,436.25/7,385.91
  6. Step 6: Final answer
    x = 3,287.67

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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.