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Finding the Fourth Proportional to 22.81, 31.47 and 15.52

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Solution

The fourth proportional to 22.81, 31.47 and 15.52 is: 21.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.81 : 31.47 = 15.52 : x
  2. Step 2: Convert to fraction form
    22.81/31.47 = 15.52/x
  3. Step 3: Cross multiply
    22.81x = 31.47 × 15.52
  4. Step 4: Simplify right side
    22.81x = 488.41
  5. Step 5: Solve for x
    x = 488.41/22.81
  6. Step 6: Final answer
    x = 21.41

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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.