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Finding the Fourth Proportional to 55.25, 82.86 and 16.72

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Solution

The fourth proportional to 55.25, 82.86 and 16.72 is: 25.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.25 : 82.86 = 16.72 : x
  2. Step 2: Convert to fraction form
    55.25/82.86 = 16.72/x
  3. Step 3: Cross multiply
    55.25x = 82.86 × 16.72
  4. Step 4: Simplify right side
    55.25x = 1,385.76
  5. Step 5: Solve for x
    x = 1,385.76/55.25
  6. Step 6: Final answer
    x = 25.08

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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.