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Finding the Fourth Proportional to 7,111.67, 10,668.87 and 2,728.78

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Solution

The fourth proportional to 7,111.67, 10,668.87 and 2,728.78 is: 4,093.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.67 : 10,668.87 = 2,728.78 : x
  2. Step 2: Convert to fraction form
    7,111.67/10,668.87 = 2,728.78/x
  3. Step 3: Cross multiply
    7,111.67x = 10,668.87 × 2,728.78
  4. Step 4: Simplify right side
    7,111.67x = 29,113,005.90
  5. Step 5: Solve for x
    x = 29,113,005.90/7,111.67
  6. Step 6: Final answer
    x = 4,093.70

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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.