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Finding the Fourth Proportional to 27.50, 37.98 and 18.86

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Solution

The fourth proportional to 27.50, 37.98 and 18.86 is: 26.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.50 : 37.98 = 18.86 : x
  2. Step 2: Convert to fraction form
    27.50/37.98 = 18.86/x
  3. Step 3: Cross multiply
    27.50x = 37.98 × 18.86
  4. Step 4: Simplify right side
    27.50x = 716.30
  5. Step 5: Solve for x
    x = 716.30/27.50
  6. Step 6: Final answer
    x = 26.05

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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.