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Finding the Fourth Proportional to 18,999.96, 28,490.22 and 11,105.16

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Solution

The fourth proportional to 18,999.96, 28,490.22 and 11,105.16 is: 16,652.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.96 : 28,490.22 = 11,105.16 : x
  2. Step 2: Convert to fraction form
    18,999.96/28,490.22 = 11,105.16/x
  3. Step 3: Cross multiply
    18,999.96x = 28,490.22 × 11,105.16
  4. Step 4: Simplify right side
    18,999.96x = 316,388,451.54
  5. Step 5: Solve for x
    x = 316,388,451.54/18,999.96
  6. Step 6: Final answer
    x = 16,652.06

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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.