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Finding the Fourth Proportional to 14.67, 20.40 and 14.61

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Solution

The fourth proportional to 14.67, 20.40 and 14.61 is: 20.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.67 : 20.40 = 14.61 : x
  2. Step 2: Convert to fraction form
    14.67/20.40 = 14.61/x
  3. Step 3: Cross multiply
    14.67x = 20.40 × 14.61
  4. Step 4: Simplify right side
    14.67x = 298.04
  5. Step 5: Solve for x
    x = 298.04/14.67
  6. Step 6: Final answer
    x = 20.32

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1.5x scale

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.