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Finding the Fourth Proportional to 14.76, 21.96 and 14.72

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Solution

The fourth proportional to 14.76, 21.96 and 14.72 is: 21.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.76 : 21.96 = 14.72 : x
  2. Step 2: Convert to fraction form
    14.76/21.96 = 14.72/x
  3. Step 3: Cross multiply
    14.76x = 21.96 × 14.72
  4. Step 4: Simplify right side
    14.76x = 323.25
  5. Step 5: Solve for x
    x = 323.25/14.76
  6. Step 6: Final answer
    x = 21.90

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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.