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Finding the Fourth Proportional to 14.29, 21.28 and 14.13

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Solution

The fourth proportional to 14.29, 21.28 and 14.13 is: 21.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.29 : 21.28 = 14.13 : x
  2. Step 2: Convert to fraction form
    14.29/21.28 = 14.13/x
  3. Step 3: Cross multiply
    14.29x = 21.28 × 14.13
  4. Step 4: Simplify right side
    14.29x = 300.69
  5. Step 5: Solve for x
    x = 300.69/14.29
  6. Step 6: Final answer
    x = 21.05

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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.