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Finding the Fourth Proportional to 15.08, 20.80 and 14.80

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Solution

The fourth proportional to 15.08, 20.80 and 14.80 is: 20.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.08 : 20.80 = 14.80 : x
  2. Step 2: Convert to fraction form
    15.08/20.80 = 14.80/x
  3. Step 3: Cross multiply
    15.08x = 20.80 × 14.80
  4. Step 4: Simplify right side
    15.08x = 307.84
  5. Step 5: Solve for x
    x = 307.84/15.08
  6. Step 6: Final answer
    x = 20.41

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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.