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Finding the Fourth Proportional to 23.30, 35.12 and 19.31

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Solution

The fourth proportional to 23.30, 35.12 and 19.31 is: 29.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.30 : 35.12 = 19.31 : x
  2. Step 2: Convert to fraction form
    23.30/35.12 = 19.31/x
  3. Step 3: Cross multiply
    23.30x = 35.12 × 19.31
  4. Step 4: Simplify right side
    23.30x = 678.16
  5. Step 5: Solve for x
    x = 678.16/23.30
  6. Step 6: Final answer
    x = 29.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.