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Finding the Fourth Proportional to 19.99, 27.56 and 16.48

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Solution

The fourth proportional to 19.99, 27.56 and 16.48 is: 22.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.99 : 27.56 = 16.48 : x
  2. Step 2: Convert to fraction form
    19.99/27.56 = 16.48/x
  3. Step 3: Cross multiply
    19.99x = 27.56 × 16.48
  4. Step 4: Simplify right side
    19.99x = 454.19
  5. Step 5: Solve for x
    x = 454.19/19.99
  6. Step 6: Final answer
    x = 22.72

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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.