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Finding the Fourth Proportional to 15.66, 23.35 and 15.39

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Solution

The fourth proportional to 15.66, 23.35 and 15.39 is: 22.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.66 : 23.35 = 15.39 : x
  2. Step 2: Convert to fraction form
    15.66/23.35 = 15.39/x
  3. Step 3: Cross multiply
    15.66x = 23.35 × 15.39
  4. Step 4: Simplify right side
    15.66x = 359.36
  5. Step 5: Solve for x
    x = 359.36/15.66
  6. Step 6: Final answer
    x = 22.95

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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.