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Finding the Fourth Proportional to 17.61, 24.25 and 13.72

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Solution

The fourth proportional to 17.61, 24.25 and 13.72 is: 18.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.61 : 24.25 = 13.72 : x
  2. Step 2: Convert to fraction form
    17.61/24.25 = 13.72/x
  3. Step 3: Cross multiply
    17.61x = 24.25 × 13.72
  4. Step 4: Simplify right side
    17.61x = 332.71
  5. Step 5: Solve for x
    x = 332.71/17.61
  6. Step 6: Final answer
    x = 18.89

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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.