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Finding the Fourth Proportional to 29.26, 40.36 and 21.47

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Solution

The fourth proportional to 29.26, 40.36 and 21.47 is: 29.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.26 : 40.36 = 21.47 : x
  2. Step 2: Convert to fraction form
    29.26/40.36 = 21.47/x
  3. Step 3: Cross multiply
    29.26x = 40.36 × 21.47
  4. Step 4: Simplify right side
    29.26x = 866.42
  5. Step 5: Solve for x
    x = 866.42/29.26
  6. Step 6: Final answer
    x = 29.62

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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.