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Finding the Fourth Proportional to 19.40, 28.93 and 18.04

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Solution

The fourth proportional to 19.40, 28.93 and 18.04 is: 26.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.40 : 28.93 = 18.04 : x
  2. Step 2: Convert to fraction form
    19.40/28.93 = 18.04/x
  3. Step 3: Cross multiply
    19.40x = 28.93 × 18.04
  4. Step 4: Simplify right side
    19.40x = 521.90
  5. Step 5: Solve for x
    x = 521.90/19.40
  6. Step 6: Final answer
    x = 26.90

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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.