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Finding the Fourth Proportional to 15.59, 23.20 and 15.17

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Solution

The fourth proportional to 15.59, 23.20 and 15.17 is: 22.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.59 : 23.20 = 15.17 : x
  2. Step 2: Convert to fraction form
    15.59/23.20 = 15.17/x
  3. Step 3: Cross multiply
    15.59x = 23.20 × 15.17
  4. Step 4: Simplify right side
    15.59x = 351.94
  5. Step 5: Solve for x
    x = 351.94/15.59
  6. Step 6: Final answer
    x = 22.57

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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.