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Finding the Fourth Proportional to 21.55, 32.26 and 13.01

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Solution

The fourth proportional to 21.55, 32.26 and 13.01 is: 19.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.55 : 32.26 = 13.01 : x
  2. Step 2: Convert to fraction form
    21.55/32.26 = 13.01/x
  3. Step 3: Cross multiply
    21.55x = 32.26 × 13.01
  4. Step 4: Simplify right side
    21.55x = 419.70
  5. Step 5: Solve for x
    x = 419.70/21.55
  6. Step 6: Final answer
    x = 19.48

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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.