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Finding the Fourth Proportional to 39.54, 59.43 and 19.28

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Solution

The fourth proportional to 39.54, 59.43 and 19.28 is: 28.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.54 : 59.43 = 19.28 : x
  2. Step 2: Convert to fraction form
    39.54/59.43 = 19.28/x
  3. Step 3: Cross multiply
    39.54x = 59.43 × 19.28
  4. Step 4: Simplify right side
    39.54x = 1,145.51
  5. Step 5: Solve for x
    x = 1,145.51/39.54
  6. Step 6: Final answer
    x = 28.97

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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.