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Finding the Fourth Proportional to 39.00, 53.75 and 27.92

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Solution

The fourth proportional to 39.00, 53.75 and 27.92 is: 38.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.00 : 53.75 = 27.92 : x
  2. Step 2: Convert to fraction form
    39.00/53.75 = 27.92/x
  3. Step 3: Cross multiply
    39.00x = 53.75 × 27.92
  4. Step 4: Simplify right side
    39.00x = 1,500.38
  5. Step 5: Solve for x
    x = 1,500.38/39.00
  6. Step 6: Final answer
    x = 38.47

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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.