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Finding the Fourth Proportional to 35.03, 48.36 and 21.21

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Solution

The fourth proportional to 35.03, 48.36 and 21.21 is: 29.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.03 : 48.36 = 21.21 : x
  2. Step 2: Convert to fraction form
    35.03/48.36 = 21.21/x
  3. Step 3: Cross multiply
    35.03x = 48.36 × 21.21
  4. Step 4: Simplify right side
    35.03x = 1,025.72
  5. Step 5: Solve for x
    x = 1,025.72/35.03
  6. Step 6: Final answer
    x = 29.28

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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.