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Finding the Fourth Proportional to 21.84, 32.77 and 6.63

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Solution

The fourth proportional to 21.84, 32.77 and 6.63 is: 9.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.84 : 32.77 = 6.63 : x
  2. Step 2: Convert to fraction form
    21.84/32.77 = 6.63/x
  3. Step 3: Cross multiply
    21.84x = 32.77 × 6.63
  4. Step 4: Simplify right side
    21.84x = 217.10
  5. Step 5: Solve for x
    x = 217.10/21.84
  6. Step 6: Final answer
    x = 9.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.