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Finding the Fourth Proportional to 19.71, 29.49 and 16.47

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Solution

The fourth proportional to 19.71, 29.49 and 16.47 is: 24.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.71 : 29.49 = 16.47 : x
  2. Step 2: Convert to fraction form
    19.71/29.49 = 16.47/x
  3. Step 3: Cross multiply
    19.71x = 29.49 × 16.47
  4. Step 4: Simplify right side
    19.71x = 485.70
  5. Step 5: Solve for x
    x = 485.70/19.71
  6. Step 6: Final answer
    x = 24.64

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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.