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Finding the Fourth Proportional to 13.24, 19.84 and 13

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Solution

The fourth proportional to 13.24, 19.84 and 13 is: 19.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.24 : 19.84 = 13 : x
  2. Step 2: Convert to fraction form
    13.24/19.84 = 13/x
  3. Step 3: Cross multiply
    13.24x = 19.84 × 13
  4. Step 4: Simplify right side
    13.24x = 257.92
  5. Step 5: Solve for x
    x = 257.92/13.24
  6. Step 6: Final answer
    x = 19.48

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.