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Finding the Fourth Proportional to 21.98, 32.74 and 21.86

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Solution

The fourth proportional to 21.98, 32.74 and 21.86 is: 32.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.98 : 32.74 = 21.86 : x
  2. Step 2: Convert to fraction form
    21.98/32.74 = 21.86/x
  3. Step 3: Cross multiply
    21.98x = 32.74 × 21.86
  4. Step 4: Simplify right side
    21.98x = 715.70
  5. Step 5: Solve for x
    x = 715.70/21.98
  6. Step 6: Final answer
    x = 32.56

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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.