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Finding the Fourth Proportional to 24.71, 36.90 and 21.51

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Solution

The fourth proportional to 24.71, 36.90 and 21.51 is: 32.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.71 : 36.90 = 21.51 : x
  2. Step 2: Convert to fraction form
    24.71/36.90 = 21.51/x
  3. Step 3: Cross multiply
    24.71x = 36.90 × 21.51
  4. Step 4: Simplify right side
    24.71x = 793.72
  5. Step 5: Solve for x
    x = 793.72/24.71
  6. Step 6: Final answer
    x = 32.12

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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.