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Finding the Fourth Proportional to 23.45, 32.39 and 21.26

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Solution

The fourth proportional to 23.45, 32.39 and 21.26 is: 29.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.45 : 32.39 = 21.26 : x
  2. Step 2: Convert to fraction form
    23.45/32.39 = 21.26/x
  3. Step 3: Cross multiply
    23.45x = 32.39 × 21.26
  4. Step 4: Simplify right side
    23.45x = 688.34
  5. Step 5: Solve for x
    x = 688.34/23.45
  6. Step 6: Final answer
    x = 29.36

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1.5x scale

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.