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Finding the Fourth Proportional to 18,804.96, 28,164.12 and 13,507.08

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Solution

The fourth proportional to 18,804.96, 28,164.12 and 13,507.08 is: 20,229.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.96 : 28,164.12 = 13,507.08 : x
  2. Step 2: Convert to fraction form
    18,804.96/28,164.12 = 13,507.08/x
  3. Step 3: Cross multiply
    18,804.96x = 28,164.12 × 13,507.08
  4. Step 4: Simplify right side
    18,804.96x = 380,415,021.97
  5. Step 5: Solve for x
    x = 380,415,021.97/18,804.96
  6. Step 6: Final answer
    x = 20,229.50

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Double scale
Find fourth proportional to 18,805.96, 28,165.62 and 13,508.08
Similar ratio
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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.