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Finding the Fourth Proportional to 21.54, 32.28 and 14.69

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Solution

The fourth proportional to 21.54, 32.28 and 14.69 is: 22.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.54 : 32.28 = 14.69 : x
  2. Step 2: Convert to fraction form
    21.54/32.28 = 14.69/x
  3. Step 3: Cross multiply
    21.54x = 32.28 × 14.69
  4. Step 4: Simplify right side
    21.54x = 474.03
  5. Step 5: Solve for x
    x = 474.03/21.54
  6. Step 6: Final answer
    x = 22.01

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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.