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Finding the Fourth Proportional to 18.57, 27.69 and 15.99

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Solution

The fourth proportional to 18.57, 27.69 and 15.99 is: 23.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.57 : 27.69 = 15.99 : x
  2. Step 2: Convert to fraction form
    18.57/27.69 = 15.99/x
  3. Step 3: Cross multiply
    18.57x = 27.69 × 15.99
  4. Step 4: Simplify right side
    18.57x = 442.76
  5. Step 5: Solve for x
    x = 442.76/18.57
  6. Step 6: Final answer
    x = 23.84

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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.