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Finding the Fourth Proportional to 35.12, 52.62 and 19.91

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Solution

The fourth proportional to 35.12, 52.62 and 19.91 is: 29.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.12 : 52.62 = 19.91 : x
  2. Step 2: Convert to fraction form
    35.12/52.62 = 19.91/x
  3. Step 3: Cross multiply
    35.12x = 52.62 × 19.91
  4. Step 4: Simplify right side
    35.12x = 1,047.66
  5. Step 5: Solve for x
    x = 1,047.66/35.12
  6. Step 6: Final answer
    x = 29.83

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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.