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Finding the Fourth Proportional to 24.61, 36.71 and 21.79

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Solution

The fourth proportional to 24.61, 36.71 and 21.79 is: 32.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.61 : 36.71 = 21.79 : x
  2. Step 2: Convert to fraction form
    24.61/36.71 = 21.79/x
  3. Step 3: Cross multiply
    24.61x = 36.71 × 21.79
  4. Step 4: Simplify right side
    24.61x = 799.62
  5. Step 5: Solve for x
    x = 799.62/24.61
  6. Step 6: Final answer
    x = 32.50

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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.