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Finding the Fourth Proportional to 26.61, 39.92 and 16.99

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Solution

The fourth proportional to 26.61, 39.92 and 16.99 is: 25.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.61 : 39.92 = 16.99 : x
  2. Step 2: Convert to fraction form
    26.61/39.92 = 16.99/x
  3. Step 3: Cross multiply
    26.61x = 39.92 × 16.99
  4. Step 4: Simplify right side
    26.61x = 678.24
  5. Step 5: Solve for x
    x = 678.24/26.61
  6. Step 6: Final answer
    x = 25.49

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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.