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Finding the Fourth Proportional to 18.79, 28.33 and 15.45

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Solution

The fourth proportional to 18.79, 28.33 and 15.45 is: 23.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.79 : 28.33 = 15.45 : x
  2. Step 2: Convert to fraction form
    18.79/28.33 = 15.45/x
  3. Step 3: Cross multiply
    18.79x = 28.33 × 15.45
  4. Step 4: Simplify right side
    18.79x = 437.71
  5. Step 5: Solve for x
    x = 437.71/18.79
  6. Step 6: Final answer
    x = 23.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.