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Finding the Fourth Proportional to 9,108.40, 13,662.60 and 5,414.80

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Solution

The fourth proportional to 9,108.40, 13,662.60 and 5,414.80 is: 8,122.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.40 : 13,662.60 = 5,414.80 : x
  2. Step 2: Convert to fraction form
    9,108.40/13,662.60 = 5,414.80/x
  3. Step 3: Cross multiply
    9,108.40x = 13,662.60 × 5,414.80
  4. Step 4: Simplify right side
    9,108.40x = 73,980,246.48
  5. Step 5: Solve for x
    x = 73,980,246.48/9,108.40
  6. Step 6: Final answer
    x = 8,122.20

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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.