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Finding the Fourth Proportional to 14.17, 21.43 and 14.02

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Solution

The fourth proportional to 14.17, 21.43 and 14.02 is: 21.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.17 : 21.43 = 14.02 : x
  2. Step 2: Convert to fraction form
    14.17/21.43 = 14.02/x
  3. Step 3: Cross multiply
    14.17x = 21.43 × 14.02
  4. Step 4: Simplify right side
    14.17x = 300.45
  5. Step 5: Solve for x
    x = 300.45/14.17
  6. Step 6: Final answer
    x = 21.20

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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.