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Finding the Fourth Proportional to 39.63, 59.45 and 18.25

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Solution

The fourth proportional to 39.63, 59.45 and 18.25 is: 27.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.63 : 59.45 = 18.25 : x
  2. Step 2: Convert to fraction form
    39.63/59.45 = 18.25/x
  3. Step 3: Cross multiply
    39.63x = 59.45 × 18.25
  4. Step 4: Simplify right side
    39.63x = 1,084.96
  5. Step 5: Solve for x
    x = 1,084.96/39.63
  6. Step 6: Final answer
    x = 27.38

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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.