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Finding the Fourth Proportional to 18.06, 26.96 and 15.65

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Solution

The fourth proportional to 18.06, 26.96 and 15.65 is: 23.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.06 : 26.96 = 15.65 : x
  2. Step 2: Convert to fraction form
    18.06/26.96 = 15.65/x
  3. Step 3: Cross multiply
    18.06x = 26.96 × 15.65
  4. Step 4: Simplify right side
    18.06x = 421.71
  5. Step 5: Solve for x
    x = 421.71/18.06
  6. Step 6: Final answer
    x = 23.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.