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Finding the Fourth Proportional to 29.30, 43.96 and 15.80

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Solution

The fourth proportional to 29.30, 43.96 and 15.80 is: 23.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.30 : 43.96 = 15.80 : x
  2. Step 2: Convert to fraction form
    29.30/43.96 = 15.80/x
  3. Step 3: Cross multiply
    29.30x = 43.96 × 15.80
  4. Step 4: Simplify right side
    29.30x = 694.34
  5. Step 5: Solve for x
    x = 694.34/29.30
  6. Step 6: Final answer
    x = 23.70

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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.