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Finding the Fourth Proportional to 27.48, 37.92 and 18.15

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Solution

The fourth proportional to 27.48, 37.92 and 18.15 is: 25.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.48 : 37.92 = 18.15 : x
  2. Step 2: Convert to fraction form
    27.48/37.92 = 18.15/x
  3. Step 3: Cross multiply
    27.48x = 37.92 × 18.15
  4. Step 4: Simplify right side
    27.48x = 688.25
  5. Step 5: Solve for x
    x = 688.25/27.48
  6. Step 6: Final answer
    x = 25.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.