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Finding the Fourth Proportional to 32.92, 49.12 and 31.56

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Solution

The fourth proportional to 32.92, 49.12 and 31.56 is: 47.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.92 : 49.12 = 31.56 : x
  2. Step 2: Convert to fraction form
    32.92/49.12 = 31.56/x
  3. Step 3: Cross multiply
    32.92x = 49.12 × 31.56
  4. Step 4: Simplify right side
    32.92x = 1,550.23
  5. Step 5: Solve for x
    x = 1,550.23/32.92
  6. Step 6: Final answer
    x = 47.09

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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.