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Finding the Fourth Proportional to 27.28, 37.64 and 15.00

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Solution

The fourth proportional to 27.28, 37.64 and 15.00 is: 20.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.28 : 37.64 = 15.00 : x
  2. Step 2: Convert to fraction form
    27.28/37.64 = 15.00/x
  3. Step 3: Cross multiply
    27.28x = 37.64 × 15.00
  4. Step 4: Simplify right side
    27.28x = 564.48
  5. Step 5: Solve for x
    x = 564.48/27.28
  6. Step 6: Final answer
    x = 20.69

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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.