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Finding the Fourth Proportional to 15.60, 23.44 and 13.28

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Solution

The fourth proportional to 15.60, 23.44 and 13.28 is: 19.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.60 : 23.44 = 13.28 : x
  2. Step 2: Convert to fraction form
    15.60/23.44 = 13.28/x
  3. Step 3: Cross multiply
    15.60x = 23.44 × 13.28
  4. Step 4: Simplify right side
    15.60x = 311.28
  5. Step 5: Solve for x
    x = 311.28/15.60
  6. Step 6: Final answer
    x = 19.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.