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Finding the Fourth Proportional to 21.46, 32 and 19.96

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Solution

The fourth proportional to 21.46, 32 and 19.96 is: 29.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.46 : 32 = 19.96 : x
  2. Step 2: Convert to fraction form
    21.46/32 = 19.96/x
  3. Step 3: Cross multiply
    21.46x = 32 × 19.96
  4. Step 4: Simplify right side
    21.46x = 638.72
  5. Step 5: Solve for x
    x = 638.72/21.46
  6. Step 6: Final answer
    x = 29.76

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.