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Finding the Fourth Proportional to 14.88, 20.43 and 12.45

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Solution

The fourth proportional to 14.88, 20.43 and 12.45 is: 17.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.88 : 20.43 = 12.45 : x
  2. Step 2: Convert to fraction form
    14.88/20.43 = 12.45/x
  3. Step 3: Cross multiply
    14.88x = 20.43 × 12.45
  4. Step 4: Simplify right side
    14.88x = 254.35
  5. Step 5: Solve for x
    x = 254.35/14.88
  6. Step 6: Final answer
    x = 17.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.