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Finding the Fourth Proportional to 14.50, 21.61 and 13.47

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Solution

The fourth proportional to 14.50, 21.61 and 13.47 is: 20.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.50 : 21.61 = 13.47 : x
  2. Step 2: Convert to fraction form
    14.50/21.61 = 13.47/x
  3. Step 3: Cross multiply
    14.50x = 21.61 × 13.47
  4. Step 4: Simplify right side
    14.50x = 291.09
  5. Step 5: Solve for x
    x = 291.09/14.50
  6. Step 6: Final answer
    x = 20.07

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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.