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Finding the Fourth Proportional to 37.61, 51.90 and 21.23

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Solution

The fourth proportional to 37.61, 51.90 and 21.23 is: 29.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.61 : 51.90 = 21.23 : x
  2. Step 2: Convert to fraction form
    37.61/51.90 = 21.23/x
  3. Step 3: Cross multiply
    37.61x = 51.90 × 21.23
  4. Step 4: Simplify right side
    37.61x = 1,101.84
  5. Step 5: Solve for x
    x = 1,101.84/37.61
  6. Step 6: Final answer
    x = 29.30

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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.