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Finding the Fourth Proportional to 23.98, 33.08 and 15.78

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Solution

The fourth proportional to 23.98, 33.08 and 15.78 is: 21.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.98 : 33.08 = 15.78 : x
  2. Step 2: Convert to fraction form
    23.98/33.08 = 15.78/x
  3. Step 3: Cross multiply
    23.98x = 33.08 × 15.78
  4. Step 4: Simplify right side
    23.98x = 522.00
  5. Step 5: Solve for x
    x = 522.00/23.98
  6. Step 6: Final answer
    x = 21.77

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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.