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Finding the Fourth Proportional to 16.64, 24.81 and 15.50

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Solution

The fourth proportional to 16.64, 24.81 and 15.50 is: 23.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.64 : 24.81 = 15.50 : x
  2. Step 2: Convert to fraction form
    16.64/24.81 = 15.50/x
  3. Step 3: Cross multiply
    16.64x = 24.81 × 15.50
  4. Step 4: Simplify right side
    16.64x = 384.56
  5. Step 5: Solve for x
    x = 384.56/16.64
  6. Step 6: Final answer
    x = 23.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.