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Finding the Fourth Proportional to 14.46, 21.80 and 13.47

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Solution

The fourth proportional to 14.46, 21.80 and 13.47 is: 20.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.46 : 21.80 = 13.47 : x
  2. Step 2: Convert to fraction form
    14.46/21.80 = 13.47/x
  3. Step 3: Cross multiply
    14.46x = 21.80 × 13.47
  4. Step 4: Simplify right side
    14.46x = 293.58
  5. Step 5: Solve for x
    x = 293.58/14.46
  6. Step 6: Final answer
    x = 20.30

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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.