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Finding the Fourth Proportional to 22.63, 31.18 and 18.98

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Solution

The fourth proportional to 22.63, 31.18 and 18.98 is: 26.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.63 : 31.18 = 18.98 : x
  2. Step 2: Convert to fraction form
    22.63/31.18 = 18.98/x
  3. Step 3: Cross multiply
    22.63x = 31.18 × 18.98
  4. Step 4: Simplify right side
    22.63x = 591.80
  5. Step 5: Solve for x
    x = 591.80/22.63
  6. Step 6: Final answer
    x = 26.15

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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.