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Finding the Fourth Proportional to 17.07, 23.43 and 15.86

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Solution

The fourth proportional to 17.07, 23.43 and 15.86 is: 21.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.07 : 23.43 = 15.86 : x
  2. Step 2: Convert to fraction form
    17.07/23.43 = 15.86/x
  3. Step 3: Cross multiply
    17.07x = 23.43 × 15.86
  4. Step 4: Simplify right side
    17.07x = 371.60
  5. Step 5: Solve for x
    x = 371.60/17.07
  6. Step 6: Final answer
    x = 21.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.