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Finding the Fourth Proportional to 18,829.20, 28,272.60 and 11,053.20

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Solution

The fourth proportional to 18,829.20, 28,272.60 and 11,053.20 is: 16,596.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,829.20 : 28,272.60 = 11,053.20 : x
  2. Step 2: Convert to fraction form
    18,829.20/28,272.60 = 11,053.20/x
  3. Step 3: Cross multiply
    18,829.20x = 28,272.60 × 11,053.20
  4. Step 4: Simplify right side
    18,829.20x = 312,502,702.32
  5. Step 5: Solve for x
    x = 312,502,702.32/18,829.20
  6. Step 6: Final answer
    x = 16,596.71

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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.