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Finding the Fourth Proportional to 23.60, 35.28 and 20

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Solution

The fourth proportional to 23.60, 35.28 and 20 is: 29.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.60 : 35.28 = 20 : x
  2. Step 2: Convert to fraction form
    23.60/35.28 = 20/x
  3. Step 3: Cross multiply
    23.60x = 35.28 × 20
  4. Step 4: Simplify right side
    23.60x = 705.60
  5. Step 5: Solve for x
    x = 705.60/23.60
  6. Step 6: Final answer
    x = 29.90

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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.