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Finding the Fourth Proportional to 18,804.60, 28,212.80 and 11,316.33

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Solution

The fourth proportional to 18,804.60, 28,212.80 and 11,316.33 is: 16,978.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.60 : 28,212.80 = 11,316.33 : x
  2. Step 2: Convert to fraction form
    18,804.60/28,212.80 = 11,316.33/x
  3. Step 3: Cross multiply
    18,804.60x = 28,212.80 × 11,316.33
  4. Step 4: Simplify right side
    18,804.60x = 319,265,298.44
  5. Step 5: Solve for x
    x = 319,265,298.44/18,804.60
  6. Step 6: Final answer
    x = 16,978.04

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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.