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Finding the Fourth Proportional to 19.60, 26.90 and 19.43

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Solution

The fourth proportional to 19.60, 26.90 and 19.43 is: 26.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.60 : 26.90 = 19.43 : x
  2. Step 2: Convert to fraction form
    19.60/26.90 = 19.43/x
  3. Step 3: Cross multiply
    19.60x = 26.90 × 19.43
  4. Step 4: Simplify right side
    19.60x = 522.67
  5. Step 5: Solve for x
    x = 522.67/19.60
  6. Step 6: Final answer
    x = 26.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.