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Finding the Fourth Proportional to 11,108.40, 16,662.60 and 6,426.60

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Solution

The fourth proportional to 11,108.40, 16,662.60 and 6,426.60 is: 9,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,108.40 : 16,662.60 = 6,426.60 : x
  2. Step 2: Convert to fraction form
    11,108.40/16,662.60 = 6,426.60/x
  3. Step 3: Cross multiply
    11,108.40x = 16,662.60 × 6,426.60
  4. Step 4: Simplify right side
    11,108.40x = 107,083,865.16
  5. Step 5: Solve for x
    x = 107,083,865.16/11,108.40
  6. Step 6: Final answer
    x = 9,639.90

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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.