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Finding the Fourth Proportional to 23.20, 32 and 21.06

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Solution

The fourth proportional to 23.20, 32 and 21.06 is: 29.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.20 : 32 = 21.06 : x
  2. Step 2: Convert to fraction form
    23.20/32 = 21.06/x
  3. Step 3: Cross multiply
    23.20x = 32 × 21.06
  4. Step 4: Simplify right side
    23.20x = 673.92
  5. Step 5: Solve for x
    x = 673.92/23.20
  6. Step 6: Final answer
    x = 29.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.