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Finding the Fourth Proportional to 37.08, 55.68 and 20.88

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Solution

The fourth proportional to 37.08, 55.68 and 20.88 is: 31.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.08 : 55.68 = 20.88 : x
  2. Step 2: Convert to fraction form
    37.08/55.68 = 20.88/x
  3. Step 3: Cross multiply
    37.08x = 55.68 × 20.88
  4. Step 4: Simplify right side
    37.08x = 1,162.60
  5. Step 5: Solve for x
    x = 1,162.60/37.08
  6. Step 6: Final answer
    x = 31.35

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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.