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Finding the Fourth Proportional to 15.24, 20.99 and 14.69

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Solution

The fourth proportional to 15.24, 20.99 and 14.69 is: 20.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.24 : 20.99 = 14.69 : x
  2. Step 2: Convert to fraction form
    15.24/20.99 = 14.69/x
  3. Step 3: Cross multiply
    15.24x = 20.99 × 14.69
  4. Step 4: Simplify right side
    15.24x = 308.16
  5. Step 5: Solve for x
    x = 308.16/15.24
  6. Step 6: Final answer
    x = 20.22

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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.