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Finding the Fourth Proportional to 10.87, 16.36 and 9.38

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Solution

The fourth proportional to 10.87, 16.36 and 9.38 is: 14.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.87 : 16.36 = 9.38 : x
  2. Step 2: Convert to fraction form
    10.87/16.36 = 9.38/x
  3. Step 3: Cross multiply
    10.87x = 16.36 × 9.38
  4. Step 4: Simplify right side
    10.87x = 153.47
  5. Step 5: Solve for x
    x = 153.47/10.87
  6. Step 6: Final answer
    x = 14.12

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.