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Finding the Fourth Proportional to 63.04, 94.56 and 21.90

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Solution

The fourth proportional to 63.04, 94.56 and 21.90 is: 32.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.04 : 94.56 = 21.90 : x
  2. Step 2: Convert to fraction form
    63.04/94.56 = 21.90/x
  3. Step 3: Cross multiply
    63.04x = 94.56 × 21.90
  4. Step 4: Simplify right side
    63.04x = 2,070.75
  5. Step 5: Solve for x
    x = 2,070.75/63.04
  6. Step 6: Final answer
    x = 32.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.