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Finding the Fourth Proportional to 18,559.72, 27,796.50 and 18,421.44

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Solution

The fourth proportional to 18,559.72, 27,796.50 and 18,421.44 is: 27,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,559.72 : 27,796.50 = 18,421.44 : x
  2. Step 2: Convert to fraction form
    18,559.72/27,796.50 = 18,421.44/x
  3. Step 3: Cross multiply
    18,559.72x = 27,796.50 × 18,421.44
  4. Step 4: Simplify right side
    18,559.72x = 512,051,556.96
  5. Step 5: Solve for x
    x = 512,051,556.96/18,559.72
  6. Step 6: Final answer
    x = 27,589.40

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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.