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Finding the Fourth Proportional to 16.51, 22.81 and 13.91

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Solution

The fourth proportional to 16.51, 22.81 and 13.91 is: 19.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.51 : 22.81 = 13.91 : x
  2. Step 2: Convert to fraction form
    16.51/22.81 = 13.91/x
  3. Step 3: Cross multiply
    16.51x = 22.81 × 13.91
  4. Step 4: Simplify right side
    16.51x = 317.29
  5. Step 5: Solve for x
    x = 317.29/16.51
  6. Step 6: Final answer
    x = 19.22

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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.