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Finding the Fourth Proportional to 29.54, 40.74 and 18.47

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Solution

The fourth proportional to 29.54, 40.74 and 18.47 is: 25.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.54 : 40.74 = 18.47 : x
  2. Step 2: Convert to fraction form
    29.54/40.74 = 18.47/x
  3. Step 3: Cross multiply
    29.54x = 40.74 × 18.47
  4. Step 4: Simplify right side
    29.54x = 752.47
  5. Step 5: Solve for x
    x = 752.47/29.54
  6. Step 6: Final answer
    x = 25.47

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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.