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Finding the Fourth Proportional to 11,221.92, 16,832.80 and 5,360.80

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Solution

The fourth proportional to 11,221.92, 16,832.80 and 5,360.80 is: 8,041.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.92 : 16,832.80 = 5,360.80 : x
  2. Step 2: Convert to fraction form
    11,221.92/16,832.80 = 5,360.80/x
  3. Step 3: Cross multiply
    11,221.92x = 16,832.80 × 5,360.80
  4. Step 4: Simplify right side
    11,221.92x = 90,237,274.24
  5. Step 5: Solve for x
    x = 90,237,274.24/11,221.92
  6. Step 6: Final answer
    x = 8,041.16

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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.