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Finding the Fourth Proportional to 14.70, 20.16 and 14.55

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Solution

The fourth proportional to 14.70, 20.16 and 14.55 is: 19.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.70 : 20.16 = 14.55 : x
  2. Step 2: Convert to fraction form
    14.70/20.16 = 14.55/x
  3. Step 3: Cross multiply
    14.70x = 20.16 × 14.55
  4. Step 4: Simplify right side
    14.70x = 293.33
  5. Step 5: Solve for x
    x = 293.33/14.70
  6. Step 6: Final answer
    x = 19.95

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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.