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Finding the Fourth Proportional to 18.95, 28.28 and 16.38

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Solution

The fourth proportional to 18.95, 28.28 and 16.38 is: 24.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.95 : 28.28 = 16.38 : x
  2. Step 2: Convert to fraction form
    18.95/28.28 = 16.38/x
  3. Step 3: Cross multiply
    18.95x = 28.28 × 16.38
  4. Step 4: Simplify right side
    18.95x = 463.14
  5. Step 5: Solve for x
    x = 463.14/18.95
  6. Step 6: Final answer
    x = 24.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.