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Finding the Fourth Proportional to 21.83, 32.93 and 21.04

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Solution

The fourth proportional to 21.83, 32.93 and 21.04 is: 31.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.83 : 32.93 = 21.04 : x
  2. Step 2: Convert to fraction form
    21.83/32.93 = 21.04/x
  3. Step 3: Cross multiply
    21.83x = 32.93 × 21.04
  4. Step 4: Simplify right side
    21.83x = 692.68
  5. Step 5: Solve for x
    x = 692.68/21.83
  6. Step 6: Final answer
    x = 31.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.