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Finding the Fourth Proportional to 7,686.54, 11,528.55 and 2,755.44

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Solution

The fourth proportional to 7,686.54, 11,528.55 and 2,755.44 is: 4,132.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.54 : 11,528.55 = 2,755.44 : x
  2. Step 2: Convert to fraction form
    7,686.54/11,528.55 = 2,755.44/x
  3. Step 3: Cross multiply
    7,686.54x = 11,528.55 × 2,755.44
  4. Step 4: Simplify right side
    7,686.54x = 31,766,227.81
  5. Step 5: Solve for x
    x = 31,766,227.81/7,686.54
  6. Step 6: Final answer
    x = 4,132.71

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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.