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Finding the Fourth Proportional to 23.55, 35.28 and 13.40

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Solution

The fourth proportional to 23.55, 35.28 and 13.40 is: 20.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.55 : 35.28 = 13.40 : x
  2. Step 2: Convert to fraction form
    23.55/35.28 = 13.40/x
  3. Step 3: Cross multiply
    23.55x = 35.28 × 13.40
  4. Step 4: Simplify right side
    23.55x = 472.58
  5. Step 5: Solve for x
    x = 472.58/23.55
  6. Step 6: Final answer
    x = 20.07

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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.