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Finding the Fourth Proportional to 31.66, 47.66 and 27.93

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Solution

The fourth proportional to 31.66, 47.66 and 27.93 is: 42.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.66 : 47.66 = 27.93 : x
  2. Step 2: Convert to fraction form
    31.66/47.66 = 27.93/x
  3. Step 3: Cross multiply
    31.66x = 47.66 × 27.93
  4. Step 4: Simplify right side
    31.66x = 1,331.14
  5. Step 5: Solve for x
    x = 1,331.14/31.66
  6. Step 6: Final answer
    x = 42.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.