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Finding the Fourth Proportional to 14.32, 21.64 and 13.91

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Solution

The fourth proportional to 14.32, 21.64 and 13.91 is: 21.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.32 : 21.64 = 13.91 : x
  2. Step 2: Convert to fraction form
    14.32/21.64 = 13.91/x
  3. Step 3: Cross multiply
    14.32x = 21.64 × 13.91
  4. Step 4: Simplify right side
    14.32x = 300.94
  5. Step 5: Solve for x
    x = 300.94/14.32
  6. Step 6: Final answer
    x = 21.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.