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Finding the Fourth Proportional to 9,891.95, 13,650.38 and 5,414.85

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Solution

The fourth proportional to 9,891.95, 13,650.38 and 5,414.85 is: 7,472.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.95 : 13,650.38 = 5,414.85 : x
  2. Step 2: Convert to fraction form
    9,891.95/13,650.38 = 5,414.85/x
  3. Step 3: Cross multiply
    9,891.95x = 13,650.38 × 5,414.85
  4. Step 4: Simplify right side
    9,891.95x = 73,914,707.37
  5. Step 5: Solve for x
    x = 73,914,707.37/9,891.95
  6. Step 6: Final answer
    x = 7,472.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.