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Finding the Fourth Proportional to 19.98, 27.63 and 19.58

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Solution

The fourth proportional to 19.98, 27.63 and 19.58 is: 27.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.98 : 27.63 = 19.58 : x
  2. Step 2: Convert to fraction form
    19.98/27.63 = 19.58/x
  3. Step 3: Cross multiply
    19.98x = 27.63 × 19.58
  4. Step 4: Simplify right side
    19.98x = 540.86
  5. Step 5: Solve for x
    x = 540.86/19.98
  6. Step 6: Final answer
    x = 27.07

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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.