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Finding the Fourth Proportional to 24.47, 36.48 and 21.05

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Solution

The fourth proportional to 24.47, 36.48 and 21.05 is: 31.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.47 : 36.48 = 21.05 : x
  2. Step 2: Convert to fraction form
    24.47/36.48 = 21.05/x
  3. Step 3: Cross multiply
    24.47x = 36.48 × 21.05
  4. Step 4: Simplify right side
    24.47x = 767.72
  5. Step 5: Solve for x
    x = 767.72/24.47
  6. Step 6: Final answer
    x = 31.38

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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.