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Finding the Fourth Proportional to 18,272.34, 27,408.42 and 4,421.34

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Solution

The fourth proportional to 18,272.34, 27,408.42 and 4,421.34 is: 6,631.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.34 : 27,408.42 = 4,421.34 : x
  2. Step 2: Convert to fraction form
    18,272.34/27,408.42 = 4,421.34/x
  3. Step 3: Cross multiply
    18,272.34x = 27,408.42 × 4,421.34
  4. Step 4: Simplify right side
    18,272.34x = 121,181,943.68
  5. Step 5: Solve for x
    x = 121,181,943.68/18,272.34
  6. Step 6: Final answer
    x = 6,631.99

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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.