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Finding the Fourth Proportional to 11,168.60, 16,720.09 and 8,812.10

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Solution

The fourth proportional to 11,168.60, 16,720.09 and 8,812.10 is: 13,192.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,168.60 : 16,720.09 = 8,812.10 : x
  2. Step 2: Convert to fraction form
    11,168.60/16,720.09 = 8,812.10/x
  3. Step 3: Cross multiply
    11,168.60x = 16,720.09 × 8,812.10
  4. Step 4: Simplify right side
    11,168.60x = 147,339,124.86
  5. Step 5: Solve for x
    x = 147,339,124.86/11,168.60
  6. Step 6: Final answer
    x = 13,192.27

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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.