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Finding the Fourth Proportional to 37.50, 51.74 and 21.12

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Solution

The fourth proportional to 37.50, 51.74 and 21.12 is: 29.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.50 : 51.74 = 21.12 : x
  2. Step 2: Convert to fraction form
    37.50/51.74 = 21.12/x
  3. Step 3: Cross multiply
    37.50x = 51.74 × 21.12
  4. Step 4: Simplify right side
    37.50x = 1,092.75
  5. Step 5: Solve for x
    x = 1,092.75/37.50
  6. Step 6: Final answer
    x = 29.14

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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.