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Finding the Fourth Proportional to 14.58, 20.20 and 12.30

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Solution

The fourth proportional to 14.58, 20.20 and 12.30 is: 17.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.58 : 20.20 = 12.30 : x
  2. Step 2: Convert to fraction form
    14.58/20.20 = 12.30/x
  3. Step 3: Cross multiply
    14.58x = 20.20 × 12.30
  4. Step 4: Simplify right side
    14.58x = 248.49
  5. Step 5: Solve for x
    x = 248.49/14.58
  6. Step 6: Final answer
    x = 17.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.