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Finding the Fourth Proportional to 18,739.26, 28,109.01 and 5,591.75

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Solution

The fourth proportional to 18,739.26, 28,109.01 and 5,591.75 is: 8,387.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.26 : 28,109.01 = 5,591.75 : x
  2. Step 2: Convert to fraction form
    18,739.26/28,109.01 = 5,591.75/x
  3. Step 3: Cross multiply
    18,739.26x = 28,109.01 × 5,591.75
  4. Step 4: Simplify right side
    18,739.26x = 157,178,556.67
  5. Step 5: Solve for x
    x = 157,178,556.67/18,739.26
  6. Step 6: Final answer
    x = 8,387.66

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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.