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Finding the Fourth Proportional to 10.25, 15.37 and 5.17

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Solution

The fourth proportional to 10.25, 15.37 and 5.17 is: 7.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.25 : 15.37 = 5.17 : x
  2. Step 2: Convert to fraction form
    10.25/15.37 = 5.17/x
  3. Step 3: Cross multiply
    10.25x = 15.37 × 5.17
  4. Step 4: Simplify right side
    10.25x = 79.50
  5. Step 5: Solve for x
    x = 79.50/10.25
  6. Step 6: Final answer
    x = 7.75

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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.