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Finding the Fourth Proportional to 15.36, 22.91 and 14.28

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Solution

The fourth proportional to 15.36, 22.91 and 14.28 is: 21.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.36 : 22.91 = 14.28 : x
  2. Step 2: Convert to fraction form
    15.36/22.91 = 14.28/x
  3. Step 3: Cross multiply
    15.36x = 22.91 × 14.28
  4. Step 4: Simplify right side
    15.36x = 327.13
  5. Step 5: Solve for x
    x = 327.13/15.36
  6. Step 6: Final answer
    x = 21.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.