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Finding the Fourth Proportional to 11,380.80, 17,080.80 and 5,542.40

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Solution

The fourth proportional to 11,380.80, 17,080.80 and 5,542.40 is: 8,318.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,380.80 : 17,080.80 = 5,542.40 : x
  2. Step 2: Convert to fraction form
    11,380.80/17,080.80 = 5,542.40/x
  3. Step 3: Cross multiply
    11,380.80x = 17,080.80 × 5,542.40
  4. Step 4: Simplify right side
    11,380.80x = 94,668,625.92
  5. Step 5: Solve for x
    x = 94,668,625.92/11,380.80
  6. Step 6: Final answer
    x = 8,318.28

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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.