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Finding the Fourth Proportional to 14.69, 21.91 and 14.35

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Solution

The fourth proportional to 14.69, 21.91 and 14.35 is: 21.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.69 : 21.91 = 14.35 : x
  2. Step 2: Convert to fraction form
    14.69/21.91 = 14.35/x
  3. Step 3: Cross multiply
    14.69x = 21.91 × 14.35
  4. Step 4: Simplify right side
    14.69x = 314.43
  5. Step 5: Solve for x
    x = 314.43/14.69
  6. Step 6: Final answer
    x = 21.40

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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.