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Finding the Fourth Proportional to 13.40, 18.73 and 13.40

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Solution

The fourth proportional to 13.40, 18.73 and 13.40 is: 18.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.40 : 18.73 = 13.40 : x
  2. Step 2: Convert to fraction form
    13.40/18.73 = 13.40/x
  3. Step 3: Cross multiply
    13.40x = 18.73 × 13.40
  4. Step 4: Simplify right side
    13.40x = 250.98
  5. Step 5: Solve for x
    x = 250.98/13.40
  6. Step 6: Final answer
    x = 18.73

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.