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Finding the Fourth Proportional to 16.32, 22.51 and 12.70

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Solution

The fourth proportional to 16.32, 22.51 and 12.70 is: 17.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.32 : 22.51 = 12.70 : x
  2. Step 2: Convert to fraction form
    16.32/22.51 = 12.70/x
  3. Step 3: Cross multiply
    16.32x = 22.51 × 12.70
  4. Step 4: Simplify right side
    16.32x = 285.88
  5. Step 5: Solve for x
    x = 285.88/16.32
  6. Step 6: Final answer
    x = 17.52

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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.