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Finding the Fourth Proportional to 23.56, 32.48 and 15.78

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Solution

The fourth proportional to 23.56, 32.48 and 15.78 is: 21.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.56 : 32.48 = 15.78 : x
  2. Step 2: Convert to fraction form
    23.56/32.48 = 15.78/x
  3. Step 3: Cross multiply
    23.56x = 32.48 × 15.78
  4. Step 4: Simplify right side
    23.56x = 512.53
  5. Step 5: Solve for x
    x = 512.53/23.56
  6. Step 6: Final answer
    x = 21.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.